How strange that a few billion years of evolution on the planet Earth have culminated in the species at the top of the food chain being seemingly genetically predisposed to believe that the universe, or at least the planet, would be better off without it.
So we've passed from ancient religions that warned of man's inherent evil nature and imminent destruction (often with seeming relish), to an environmentalism that warned of man's imminent destruction (taking most of the rest of the planet with us), and now move on to a worship of nature--a nature that we define as: everything except us. Of course, only man could invent an environmentalism that imagines a better world if he had never existed and which suggests that he contemplate voluntary extinction. (Apparently, if humans hadn't also evolved irony, the smartest of us would have all committed suicide by now anyway.)
Seems natural selection managed consciousness only in a life form that could help the process further along--by being its eraser.
So, if we haven't managed to demonstrate that we are born into sin, we continue to prove that we are definitely born into guilt. It's OK though. Since, we can only have aquired our guilt through the process of natural selction, we obviously need it in order to survive.