because humans are the stupidest possible creatures that can build a civilization (otherwise it would've happened earlier in our evolution This would be true i

because humans are the stupidest possible creatures that can build a civilization (otherwise it would've happened earlier in our evolution This would be true if intelligence were the only requirement of building a civilization. It's entirely possible there is some fish at the bottom of the ocean smarter than humans. But it's hard to build a civilization using fins.