Unfortunate that this comment is being downvoted to oblivion; it's a valid conjecture, and not one I've seen. Something similar that gets little or no attention

Unfortunate that this comment is being downvoted to oblivion; it's a valid conjecture, and not one I've seen. Something similar that gets little or no attention is: humanities influence on species of the planet, from out right genocide and extinctions, to eugenics. There's an extreme formulation of environmentalism one could derive from David Brins Uplift stories; that the most moral thing we can do for the Potential sentient species on the planet that have not arisen yet (or maybe they have) is to get ourselves off of the planet entirely, and let nature takes its course.