That sort of thing may very well have happened in the past. And it probably sucked being a fish for quite a while.
And like many other bad things that have occurred quite naturally in the past, we'll suffer no matter what or who's causing the disaster. When the Toba caldera blew last time, for example, we almost got wiped out.
And like many other bad things that have occurred quite naturally in the past, we'll suffer no matter what or who's causing the disaster.
So la-de-da let's go around doing things that might cause more of these things to happen, after all it's natural? Sounds a lot like the "everything natural=goodness" fuzzy thinking certain people are guilty of. Lots of bad things are "natural" yet it's still a very smart policy to prevent them. Contracting STDs is natural. Tooth decay and abscesses are natural. Breaking your neck in a fall is natural. I'm still going to practice safe sex, brush and floss my teeth, and use a safety harness while climbing.
A good many resources just don't make the cost/benefit cut. Self destructively promiscuous people are a readily available resource for getting sex, but they are also a good way to irreversibly get stuck with herpes.
And like many other bad things that have occurred quite naturally in the past, we'll suffer no matter what or who's causing the disaster. When the Toba caldera blew last time, for example, we almost got wiped out.