We aren't overturning some sort of mythical 'checks and balances' that exist as if Nature was some perfect system that we're somehow ruining. We're changing Nature, sure. But Nature is in a constant state of flux. We are no less a part of nature than a bird, or a tree, or an elephant, and like those species we maximise out advantages to outcompete weaker species. We're perfectly within our 'checks and balances'
Where were the checks and balances when the land bridge between North and South America formed and the South American marsupials were wiped out by invading placentals? Where were these checks and balances when the creodonts were outcompeted by more advanced predators? Earth's history consists of constant struggle and specicide, where entire genera rose and fell and fought for dominance.
We have accomplished more than any other species in the history of this planet. Pressing that big red button will be make the last two million years an entire waste of everyone's time.
And besides, chimps or bonobos would probably evolve into our niche and do just as much damage in a few million years anyway. So whats the point?
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"Look, I'm pretty relaxed for a guy who just lost money on a rave. And who's currently speeding down the highway drunk off my tits. And I'm being chased by someone in a blue Corolla. Woohoo! I just ran a red light!"
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