Have we thrived, though? If we're talking about monkey brains and evolution, we need to keep in mind that all of the stuff we're talking about is even only a tiny fraction of the time that humans have been anatomically modern (300000 to 100000 years ago depending on exactly how modern you mean, with the 100k years ago mark being where an autopsy wouldn't be able to tell the difference unless it were specifically trying to date the corpse based on things like carbon13 or noting the dental care etc).

So all things considered, I don't think we can really say that we've proved out that the stuff we've been up to since the dawn of agriculture (10k years ago) is going to stand the test of time. Maybe let's at least see where global warming goes over the next 100-200 years before we start throwing around words like "thrive".