Earth was unique... at least that's what we thought at first.
Decades of research and observation made us believe that we were the only intelligent beings in the universe. Perhaps there was intelligent life out there, but if they existed, they seemed so far away.
That was until an alien ship arrived in our solar system and destroyed a dozen of our cities.
It wasn't until we managed to contact them and halt their bombardments that we learned a terrible truth.
Our great enemies are not the aliens... our greatest enemies are ourselves...