On Earth.
Ever since the beginning of the "Revival of Magical Powers" and the return of the Protoss.
The fortune of mankind begun its continuous decline.
As the concentration of the spiritual energy increased and the Protoss continued to get stronger, human beings could be said to have become more and more miserable.
Of course, when the concentration of spiritual energy became insufficient and the tendency towards the technological side of things became dominant, humans gained three consecutive victories in the three "War of the Races."
But the Protoss was on a winning streak for the next ten games.
Human beings were forced to make compromises ten times.
For example, in the most basic aspect of territory, humans had lost their mother planet. Billions of humans had emigrated to other places.
Then, they lost the moon. All humans on the moon were all driven away and the Protoss, again, occupied their territory.
