With the aggressive expansion of the reach of hyumankin, it was only natural for them to come across new species in space, with each species being different from the other not just in looks but also ability. Hyumankin had to constantly improve with every battle as the next opponent became stronger.
At a point, when the hyumankin had yet to reach its current peak, they were facing two species of similar strength as themselves. During that period, hyumankin was the closest it had been to becoming extinct or being relegated to second class citizens, apart from its inception era into interstellar travel. There was fear on all planets and rumours of extinction spreading around. The people were beginning to lose faith in the Federation Assembly, and even the Congress found it difficult to manage the problems in society, both economically and politically.
[1] Divine is more like a title given to this individual and Galaxy Protector is also another title. For those unaware, the hyumankin galaxy is the Niera galaxy (mentioned in chapter 7).
[2] Also a quick reminder, at the moment: Galaxy>>>Star region>>>Solar System>>>Planet>>>Continent.