Comment Only The Stable Ones Are Still Around (Score 4, Insightful) 103
All of the unstable ecosystems have failed, and their participants extinct or changed. That's the crazy part of hundreds of millions or billions of years of adaptation and evolution and environmental change - there are probably trillions of ecosystems that became unstable and collapsed - they just happened long before scientists showed up to track things.
Which isn't to say that collapses can't happen again (or that ecosystems don't fail on a daily basis) but the ones still around have whatever "secret sauce" nature requires for those groups to survive and even thrive. So far...