Prologue (No sex)
The year is 2833 in the Earth calendar; the official galactic calendar established 450 years ago when broad space exploration started. That was when human technology finally reached a point that enabled interspace travel. It was the dawn of ships that could create wormholes, bending space-time to travel long distances in a shorter time.
Such a breakthrough was bound to cause tension among the most powerful nations. However, this discovery took place in the background of several crises humanity was facing. The most severe of them all had included a food shortage caused by an unstoppable blight that destroyed the food supply worldwide at the first half of the 21st century. At the time, humanity solved the crisis by genetically manipulating every human into being able to photosynthesize. Humans became capable of generating energy to sustain their bodies only with water and a source of light from any star similar enough to the sun.
This development enabled people to consume much less food, eating only once every two weeks. As part of this drastic change in human anatomy, an unpredicted, but highly desirable, side-effect came into place. A cleaner and more stable metabolism puts a lot less strain on the cells, slowing the aging process. Health issues were drastically reduced, as less foreign substances entered the body with the reduced eating. Organs were used less often and lasted longer. The extended life-span added to the considerable advances in medicine and biomechanics caused regular people to easily reach 250 years of age. Later in current years some can live up to 400 years.
However, there are no such things as "solutions", there are merely trade-offs. A longer life span brought back an old issue: overpopulation. It was a ticking bomb. Photosynthesis bought humans time, but the population progression, lack of occupations available, taken over by technology, dwindling natural resources on Earth. Everything was going to catch up in time. Another crisis loomed on the horizon, unless humanity found ways to expand their domain. And that was when the investments into space travel came into play, leading to the development of spaceships with the wormhole technology.
A space race began as countries fought for securing resources off-world. They explored and colonized pretty much every earth-like planet within reach, increasingly pushing boundaries and going to new lengths. Historians agree that this exploration phase of space travel went on for at least two centuries. The human race found life on several other planets, but only non-intelligent life: mostly bacteria and sometimes even flora or fungi-like structures. New substances as well as new life-forms created another boom in medicine and technology.
This was the golden age of humanity. In a few centuries, humans were able to map an impressive 20% of the milky way galaxy, build supporting structures near moons and stars that allowed for further advancement in energy collection and ship construction. As humanity populated outposts and space stations all across the cosmos, advances were made in every area, technology leaped exponentially.
But instead of uniting as a race to explore the new frontier, humans simply elevated their tribalism and fought for resources within the multi-planetary level, eventually warring against each other. The United States, Russia, and China began to spend a good part of these new-found resources in weapons technology and soldier training. Smaller countries simply allied with one of these powers in the war to try and get their share. These countries slowly disappeared becoming aggregated states from the potencies and soon humans were divided into three main powerful nations, controlling earth and with colonies in most of the known space.
In the year 2457 planet Scorpio brought chaos to this scenario. Initially named Einstein-437, the planet was just one more in the list of places to explore. But this one had a native race, the first complex and intelligent alien life humans found that was technologically advanced. It turned out to be way more advanced than initially estimated.