Revulsion + Reductionism = Plenticide

Plenticide (eugenics, genocide, pesticides) : human civilization of the Modern era seems determined to get rid of all of its nearest and dearest , leaving just a tiny 'saving seed' of the most perfect and the purest of humanity to exist all alone in this vast lifeless Universe.

It just didn't make sense : for the more evidence that emerged that the universe was old, vast and empty the harder humanity, circa 1930, tried to eliminate most of what little life was confirmed to exist in the universe : that of Earth itself.