"[There is an] error of thinking that, via evolution, nature strives for perfection. The reality, however, is to the contrary. What succeeds in nature is usually no more than the best available solution to an environmental challenge. And the best solution does not have to be anywhere near perfection. You can be the second-slowest member of your group and still avoid the predator."

--The Accidental Homo Sapiens by Tattersall and DeSalle

But what happens the next time you're chased by that lion?