All Tomorrows: A Billion Year Chronicle of the Myriad Species and Mixed Fortunes of Man is a 2006 science-fiction book by C. M. Kosemen (a.k.a. Nemo Ramjet), with a heavy focus on speculative evolution. The story begins in the near future, as burgeoning population pressures force humanity to terraform and colonize Mars. After a brief but violent civil war between the two planets, the genetically engineered survivors begin a new wave of colonization, spreading across the galaxy. Everything is looking up for the human race... until the colonies encounter the Qu, technologically advanced aliens on a religious mission to remake the universe. Although humans fight valiantly, the Qu easily overpowered humanity; as punishment, these aliens decide to genetically modify the survivors, turning most of them into mindless, animalistic creatures before departing.

The pdf is actually a free release from the author

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[–] RadicalEagle 11 points 4 months ago

From the perspective of Rocco's species as a whole they have definitely been mistreated, but I wonder if Rocco has found happiness as an individual. Their human seems to care about them at least, which I think is generally considered beneficial.