Summary: The Alterans made an improved strain of humanity. The Lanteans taught humanity to embrace science. Now, the Terrans will rise to the stars and wrap the galaxy in a war of a scale never seen before. Crossover of Harry Potter and SG1. Maybe SGA. Will ignore SGU plot. Seriously AU. Contains elements of other universes but no knowledge of them is required. Maybe a crossover with something else too (leaving the option open).

Disclaimer: This author does not own Stargate, Harry Potter or any other universe mentioned. This author only owns the story. This author might proceed to smash other people's brainchildren against a metaphorical jagged rock until it is unrecognisable. Please do not be alarmed...

Cover image: The cover image was created by Nikos23a and uploaded to DeviantArt. This image is originally licensed under a (CC BY-ND 3.0) license.

Chapter 1: Excerpts from History and Technology of the Terran Alliance

The Goa'uld occupation of Earth (circa 8,000 BFE)

This period was perhaps one of ancient humanity's darkest times. Humanity back then was a very primitive race. When Ra landed in Giza, Egypt, he utilized his advanced technology to quickly establish dominance over the humans and took the mantle of a god. He later, at a yet unknown date, contacted other Goa'uld who, like him, needed a better host. Together, they moved large numbers of humans through a large ring that Ra brought with him. This device, called a Chappa'ai, is said to be able to transport goods and people to another world in the blink of an eye.

Fall of the Goa'uld on Earth (circa 6,000 BFE)

Sometime during this period, the Lanteans returned to Earth through the Goa'uld's Chappa'ai. They witnessed the suffering that humanity had to bear and helped them throw off the Goa'uld- something that would have been impossible to achieve without them. The Lanteans eventually broke up into three groups: one group sought peace and quiet, another sought to aid humanity develop while yet another felt unhappy about the state of affairs in the galaxy. In the end, one group left Earth: the group that wants to fix the problems in the galaxy. The ones seeking something they called 'Ascension' travelled south and were never seen again. This year marked a turning point for Earth as the Lantean teachers educated cultures across the world on numerous subjects such as mathematics and physics, thus laying the foundations for modern society.

Fall of Earth (year 0)

Perhaps humanity has grown too much for the Goa'uld. Perhaps the rate of advancement that humanity had made frightened them. On the year 0, at noon, a fleet of Goa'uld ships approached Earth from orbit and proceeded to lay waste to over 60 percent of Earth's population. The attack was eventually repelled by the automated systems located in an ancient structure of Alteran origin. The destruction of the Goa'uld ships began after they bombarded Antarctica in an attempt to destroy a large group of survivors who had fled there seeking safety. A subsequent scout/invasion mission of Earth by a bewildered Goa'uld was met with the same result; only the drone weapons fired at and destroyed the Goa'uld ships the moment they appeared. No other invasions have happened after that. Following the Goa'uld invasions and the unexpected destruction of their fleet, the remaining nations of the world met and formed a unified government called the 'Terran Alliance'. Earth was renamed to Terra to symbolise the unification of everybody into a single society. The Terran Alliance was governed by pseudo majority vote from all adult citizens, with each party – a group of at least 200 people which can be formed by anyone- possessing the ability to propose changes to government policy. For a week at the beginning of every month, new proposals could be entered, for which each person has the opportunity to vote on whether they support the proposal or not and also to highlight their concerns about them to make others aware. At the end of each month, the 30 highest rated proposals (by yes versus no ratio) are voted upon, with a time limit of the duration of the next month. The system dynamically divides Terran land into 100 sectors, with each sector having approximately equal numbers of people. Each person would then be given information on the proposal, the ramifications of the proposal, the 50 highest rated concerns and then asks everybody to make a vote. The total is counted within each sector and withheld votes are ignored from both sides of the count. If it passes the 70 percent minimal approval rate at the end of the voting period, the sector will send a yes signal to the central controller, otherwise, it will send a no signal. The central controller then calculates the approximate approval rate for the vote based on the numbers of sectors that voted yes or no. If this value is greater than the minimum required, the proposal passes. Within a year of this system being established, the Terran Alliance has become highly militaristic- an understandable response after most of the world was decimated. Changes included compulsory basic military and survival training for all citizens starting during their senior years of high school and continuing (until one passes), mandatory possession of at least one stun capable firearm per household, mandatory possession of at least one armoured (though not necessarily armed) vehicle per household, the construction of the Terran Global Power Grid (to maximise electrical generation efficiency and to provide significant redundancy if needed), mandatory monthly military examinations (to ensure that one stays in shape) and the reintroduction of the death penalty for all prisoners sentenced to life imprisonment (although this was mostly so that there will be less of a burden on suddenly critical resources).

Discovery of the Alteran base in Antarctica (1 ATU)

After nearly a year of cross referencing the eyewitness reports and searching, the Terran Science Union finally found the launch site for the drones that saved humanity. The site was unpowered when they arrived. Incredible discoveries had been made after engineers connected the site up to the Terran Global Power Grid. When someone sat down in the large chair at the centre of the building, the Terran Alliance gained access to a wide variety of technology and research. The logs within the systems indicated a lost city known as Atlantis and something called the 'Astria Porta'. Contained deep within the structure, several cases of crystals were discovered. When the crystals were interfaced with the building's mainframe, it was discovered that the crystals contained a fragment of the Atlantis database. The attack on Terra had led to a global effort to reverse engineer and improve upon the technology present in the outpost as well as to integrate them into mainstream society and the implementation of a system for planetary defence.

Consequences (10 ATU)

By this time, Terra was already a dying world: the environmental damage sustained by the global bombardment was horrific and for the last 7 years, the consequences were making themselves known. Massive surplus supplies of excess food due to the suddenly reduced population had either run out or spoiled. The plasma bombardment and subsequent collapse of numerous tall, concrete based skyscrapers had thrown huge amounts of dust in the air. The bombardment of settlements near active or dormant volcanoes (causing them to suddenly want to erupt) did not help matters either. Nor did the bombardment of key infrastructure such as nuclear power plants. Global temperatures plummeted as dust and volcanic ash filled the atmosphere. Crops wilted and livestock died. Entire biomes collapsed soon after, as the darkness starved and killed numerous key species of plants and, as a result, animals. Everyone was starving or dehydrated; food and clean water were being rationed. Radiation poisoning was running rampant in all life on Terra. The population by now had dropped to under 30 percent of the original 7 billion. Luckily, a discovery from the Alteran outpost changed everything: the theory behind energy to matter conversion. The first energy to matter converters were extremely inefficient and only used to mass produce food to alleviate hunger. The later models could even re-sequence existing matter into something else entirely instead of creating it using energy, thus saving an enormous amount of power. The potential for the technology was endless. By the end of the year, over 100,000 mass produced (using energy to matter converters) clean-up drones were in service, each equipped with a matter re-sequencer to purge the atmosphere of dust, ash, decaying radioisotopes and nearly a century worth of industrial pollution. In addition to this, a similar number of miniature submersible drones were also launched to clear out the pollution from the oceans and waterways of the world. This process was still incredibly slow despite the number of re-sequencers due to the severely limited power from the drone's RTGs.

Reconstruction (10 ATU to 1000 ATU)

Terra was rebuilt and repopulated during this time. After the matter resequencer drones finally finished cleaning the damage, specialised resequencers were introduced to rapidly build new cities and to restabilise the environment. The Terran Global Power Grid was extended to these previously lifeless continents and began feeding power to the new construction sites, allowing for greater energy to be available and thus speeding up the construction. During this repopulation, many racial and gender borders were dropped, finally establishing the population of Terra as one society. One of the reasons why it took so long to rebuild the world was simply due to all the new discoveries being churned out from the Antarctic base. Every decade there would be a new theory or blueprints for a device that the science teams would finally decrypt and study until they formed an understanding. These are then published and developers find a way to apply these theories. Thus, every ten years or so, a massive overhaul of all population centres would be done to ensure that the people get the latest technology and defence. By the year 980, all the readily usable technology that was acquired from the Outpost had been fully integrated and new technology was being developed based on the scientific theories. Despite their best attempts, however, a section of the information recovered from the Alteran data crystals remained heavily encrypted and inaccessible.

Genetic engineering (1020 ATU to 1360 ATU)

With the stream of advanced technology from the Outpost drying out, the Terran researchers eventually began turning their attention towards other parts of the massive Alteran archive. The most promising thing found was the significant database on genetic engineering. After a long ethical debate that lasted from 1005 to 1020, by 93 percent majority vote, the decision was carried out to begin resequencing the human genome to incorporate aspects of the Alterans'. The first live human trials were conducted in 1060, after almost 40 years of research and germ line testing. The test was a complete success and saw to the elimination of all active and recessive genetic diseases on the test subject, a massively bolstered immune system, greatly improved healing rate, heightened senses, reaction times, intelligence, strength and lifespan. Over the next 300 years, this modification was refined and slowly applied to change the entire population. Genetic engineering, however, did not just stop there. The research into the area continued. The discovery of a several million year old woman encased in ice near the Outpost introduced humanity to a new biological weapon and a potential Alteran. The bioweapon was easily cured using the improved medical knowledge in the newer Lantean database from Atlantis, however, the woman, who was named Aiyana by Terran scientists, appears to have lost her memory. Despite this, her genetics, when tested against current Terran standards, is found to be superior.

Psionic abilities (1360 ATU to 1500 ATU)

After 10 years of careful study and animal testing, another serum was made that would alter a Terran's already enhanced physiology to include the remarkable 'Touch-healing' and weak 'telepathy' abilities that the Alteran woman possessed. Following the success of the previous serum, the vote to apply this serum was met with an almost unanimous vote in favour. This serum was used until 1500 ATU, when an intriguing development occurred…

Mutation (1500 ATU)

The first mutation related to psionics was reported this day. The mutation in the primary psionics gene, 'PSI-A', gave rise to a new age for psionics. This new gene allows for significantly less specialised abilities. The abilities now included mid-level semi-autonomous telepathy, close range healing, low-level telekinesis (with a maximum strength of around half when compared to physically shifting the object), low-level physical augmentation and even the beginning of basic offensive psionic abilities. The science division tore into the blood samples and within months, came up with two new serums: one to cause the mutation on existing psionically enabled people and another to grant the new, 'flexible' psionics to ones without pre-existing psionic abilities.

Hive mind mutation engineering (1500 ATU to 1800 ATU)

With 30 years of extensive animal testing, Terran biological science teams managed to artificially induce a new, even more beneficial psionics gene, named 'PSI-A-b', and the psionic support gene, 'PSI-B', which greatly enhances the main psionics gene. These genes gave rise to even more versatility, with a massive boost in power. These genes, when used together, gave rise to a high-level semi-autonomous telepathy, high-level psionic healing for targets up to 40 metres away, high-level telekinesis, high-level physical augmentation, mid-level offensive abilities and basic defensive abilities. The first human tests conducted revealed a unique phenomenon: when two or more people are within around a kilometre of each other, their minds could form a psionic connection. The range of this connection also seems to increase exponentially depending on how many people are participating in the connection. After a short vote, these genes were also approved for application into the general populace. With the gene in place, the technological voting system of the Terran Alliance was rendered obsolete, with citizens capable of placing their vote directly into the Terran Alliance hive mind. Ideas and thoughts could be made by one individual and then instantly evaluated by the majority of Terra's population and put into action if the outcome is favourable. Crime became simply non-existent as the hive mind covered the entire planet; when a crime was committed, the hive mind would simply shred the offender's mind and examine their motivation and to identify any accomplices. If the outcome is favourable towards the person in question, their mind is reassembled and they are pardoned. If it is not, the hive mind will simply extract any information the person has before deleting their consciousness. With the hive mind active, people could share knowledge within fractions of a second, much like the internet. Unlike the internet however, the hive mind is capable of passing on understanding of the topic too. Each member of the hive mind could also choose to disconnect at any time, and the rest of the network would respect that decision unless the person has committed a crime. In 1760, a technique was discovered in which a user could allocate a portion of his brain specifically to allow the hive mind to use it. By the end of the 1800's, new technology and research projects were being introduced then completed at an astounding rate simply because each individual mind in the hive mind could utilise the allocated portions in other minds as pure, raw processing power and data storage. Group projects could be accelerated by using the psionic link to share ideas and plan with a far greater degree of efficiency and clarity. Despite these advantages, there is a minimum age of 18 required to join the hive mind, put in place after a 13 year old fatally overloaded his mind after connecting to the network.

Modulated dynamic directed energy weapons and the Neural Interface (1834 ATU)

The modulated dynamic directed energy weapon, colloquially called a 'Phaser', based off an old science fiction TV show, 'Star Trek', has been developed by the Terran Weapons Science division due to the sheer versatility that it offers. Years of research and development using supercomputer simulations and the hive mind to assist had finally paid off. For simplicity of design, the first phasers had a series of nine buttons that can each be programmed for a specific effect to be applied upon hitting a target. Default programs included 'stun' and 'kill', however, others could be installed by connecting the phaser to a computer and end entering the specific sequences of energy to distribute. The project then floundered due to the unwieldy nature of the buttons as well as the difficulty to program the weapon to fire specifically what is needed without spending half of eternity changing settings. This was solved by another division of the Terran Science Union, which worked specifically on attempting to link technology to the human mind. The second design of the phaser had no buttons except the trigger. The on-board miniature crystal computer could handle the programming and switching between different firing modes, as directed by what the user wants via the neural interface. This second phaser design was significantly more successful. A follow up third design of phaser was created, which also included a laser-like scanner system capable of detecting and helping the computer to dynamically adjust the beam to counter things such as shields and avoid friendly fire. The miniature reactionless drive on the phaser was capable of allowing it to return to its owner's hands after being disarmed. This drive system, when paired with the capability of detecting the owner's psionic signals, allowed the weapon to move and fire without ever touching the shooter's hands.

Antimatter and Antimatter reactors (1856 ATU)

With the processing power of the Terran hive mind behind the Terran Science Union and the theories and technology from the Antarctic Outpost, the first cold fusion reactor was created. These reactors were based off something that the Lantean scientists called an 'Arcturus reactor'. The power source is only used in a series of rapid pulses at around 1 percent of its original maximum capacity (according to the Lantean notes) and the energy extracted from the universe is mostly used to boost the containment field. This results in significantly less severe fluctuations in physics and thus results in a more predictable particle being produced -antiquarks. These antiparticles then undergoes cold fusion due to the slightly different laws of physics within the reactor core and the containment field redirects all hard radiation towards a group of radiation to energy converters in order to harness this otherwise useless radiation as a source of power. While this reactor is extremely stable, even if breached, it does not produce significant net power; it is the antimatter that it could easily produce that makes this reactor notable. Multiple AMFURs (Anti Matter Factory / Universe Reactor) are usually paired with a MAMAR (Matter-Antimatter Mutual Annihilation Reactor), which draws their antimatter fuel directly from the AMFRs, to generate a phenomenal amount of energy. Just 36 AMFURs and a single large MARMAR could have satisfied Terra's energy demands at the year 0 tenfold. As it stands now, multiple of these facilities needed to be constructed in order to fully supply energy to the technologically advanced Terra.

Terraforming Mars (1860 ATU to 1980 ATU)

With the greatly enhanced lifetimes of the population of Terra, immunity to most illnesses and enhanced healing rate, the population had already risen to 24 billion people. This led to a severe shortage of living space despite all of the major cities being comprised almost entirely of massive skyscrapers. An old proposal was once again reviewed. With the ability to travel in space at a maximum of 20 percent of the speed of light using their sub light drives, reaching Mars was no longer a problem. With the technology developed from the Outpost, it was also possible to terraform Mars into a habitable, stable world. By the 1960s, the project was nearing completion, with only the introduction of the final group of organisms required. By the 1980s, the biosphere of Mars had successfully stabilised however, colonisation of Mars has been put on hold due to a war on Terra…

First Wizarding War (1960 ATU to 1981 ATU)

The terrorist style attacks on groups of people using abilities bearing similarity to psionics were immediately noticed by the hive mind. As one, the Terrans shredded the minds of the aggressors, smashing through vaunted 'impenetrable' Occlumency shields. In this one move, knowledge on the Wizarding world became known to everyone. The motives of the political group known as 'Death Eaters' were dissected and analysed, however, due to a lack of knowledge on the other side, a wait and see approach was adopted, with the hive mind only stopping attacks on Terran citizens. The secrecy wards, unfortunately, could still conceal the location of Wizarding establishments around the world. In any case, 87 percent of the hive mind was satisfied with leaving the Wizarding world to sort out its own 'internal issues'. Of course, this decision was made after it became clear that the wizards were happy in their delusions of superiority and absolutely refused to embrace anything related to the 'muggles', thus essentially neutralizing themselves as a threat. However, the Terrans rightly decided that leaving the Wizarding world without a system to monitor them is foolish so they decided to splice several Wizarding genetic sequences to a number of children and adult volunteers and send them to the Wizarding world to act as spies. Though, without a Wizarding family name, the spies were almost immediately shunned by half and loved by the other half of the Wizarding world. 4 years after the spies were planted, they brought back a theory on how the Wizarding world remained undetected for so long: the wizards mistook the Goa'uld plasma bolts for a muggle attack and hid themselves even deeper, further isolating themselves. When they eventually realised the truth, there was nothing they could do to reconnect the worlds due to both Wizarding stubbornness and the fact that the first genetic modifications on the general Terran population had automatically identified magic as a genetic disorder, thus eliminating it, and with it, the potential for 'muggleborns' to be born. In 1971, agent Lily Evans was sent to spy on the Wizarding world. She finished Hogwarts, reporting back dutifully. She did however, unexpectedly fell in love with a man named James Potter and gave birth to their child, Harry Potter, in 1980. She was murdered in 1981, and no support could be given to her due to the wards on the Potter Estate interfering with her connection to the hive mind. This year, however, marked the end of the First Wizarding War. Harry Potter was then given, by an elderly wizard, to the Dursley family to raise…

Additional information (Author's notes): In case you are wondering, year 0 coincides with our current world at year 0. At that time, they are identical to our modern world at the 21st century. This is due to and the Alteran's genetic engineering of humanity to have a greater capacity for learning and self-improvement (though humanity is not aware of this fact) as well as the larger interference by the Lanteans which kick started society.

About the years: BFE = Before the Fall of Earth, ATU = After Terran Unification.

About the attack: Ra is not likely to forget where the world with the richest supply of slaves is located. He is bound to check in every now and then. And the Goa'uld always destroys industrialised societies to stop them from becoming a threat.

About RTGs: A radioisotope thermoelectric generator. Additional information could be acquired from the internet as it does exist in real life.

About the Antarctic base: The ZPM has to power the shield that protects the base against damage due to the shifting ice sheets. It is constantly drawing power and which will slowly cause it to approach maximum entropy. The ZPM in this story still has enough charge to fire the drones two times before depleting… Especially since, unlike Jack O'Neill's use in the show, the ancient computer fires them as needed instead of all of them in a huge swarm. The path down to the base is now cleared due to the drones melting a tunnel. The data crystals were contained in the packs that the Lanteans carried back through the gate. Also, in this story, humanity reaches the development to modern society 2000 years earlier. In canon, the ZPM is depleted however, in this story, it still had a tiny amount of charge by the year 0; It still would have depleted by 2000 ATU.

About psionics: PSI comes with a primary gene, which basically governs what it could do. Primary genes are named 'PSI-A-x', with x being a version number. PSI also comes with one or more support genes, which could have a variety of effects ranging from increasing the power of abilities dictated by PSI-A genes to granting unique, exceptional abilities which couldn't be passed on with a psionic link.

About technology: The Terrans have some pretty advanced stuff in some areas but not others. This is due to the fragment of the Atlantis database that the Lanteans brought back to Terra being incomplete. Stuff like power generators was based off advanced Lantean science but others, such as hyper drives, is only mentioned in passing and contains nowhere near the information level required to reproduce. The other mid-level stuff is due to the application of Lantean scientific theories or due to a lack of rare elements on Terra such as Naquadah, Trinium, etc. The low end stuff is still far more advanced than the modern, 21st century stuff we enjoy today.

About the Wizarding world: When Earth was bombarded, large populations of magicals died all around the world. The remaining magicals came to the conclusion that only the muggles were capable of accomplishing this feat. Of course, muggleborns from that time were against this thought, knowing full well that the muggle world did not make such an attack. The muggleborns paid for their words in the form of mass lynching, mass Obliviation, magic suppression, prison time and outright government sanctioned execution. With muggleborns who know about the Wizarding world virtually extinct, the Wizarding world isolated itself and refused to accept any more muggleborns. Of course, the occasional affair occurs but marrying a muggle was, by then, illegal in the Wizarding world. Any child born from such a union was either raised as solely a muggle child, as the parent's memory would be wiped, or solely as a Wizarding child, with the muggle parent unaware of the child. When their mistake had finally been recognized by the more progressive members of the Wizarding world, it was too late to do anything as any traces of genetics required to create a Wizarding child has been purged by the initial bout of global genetic engineering and subsequent insertions of those genes were supressed by the rapidly advancing pace of genetic engineering. With no muggleborns to boost their economy (i.e. exploit), force to attend Wizarding school, etc., the Wizarding world saw no need to come out of isolation, thus it continued to develop slowly and unknowing of the world around them…