Death's End

Half a century after the Doomsday Battle, the uneasy balance of the Dark Forest Deterrence keeps the Trisolaran invaders at bay.

Earth enjoys unprecedented prosperity due to the infusion of Trisolaran knowledge and, with the Trisolarans adopting Earth culture, some hope that the two civilisations will be able to co-exist without the terrible threat of mutually assured annihilation. But peace has made humanity complacent.