I believe that people are both good and evil. Evil in this case defined as selfish, greedy, or uncaring of others needs.
IF that were the case, I don't think human children would last very long seeing as no one would care for them. You have to admit that caring for children takes A LOT of self sacrifice. Sure, there are evil people out there, but to say that people are pre-destined to be evil (in the sense you mentioned) doesn't seem to add up. At least not to me, anyways.
Secondly, I can't even agree that those are actually
evil qualities. I don't tend to think of someone who is greedy as being
evil, I don't tend to think of someone who is selfish as
evil. Nor do I think of someone who is uncaring as
evil. Perhaps some more hardcore offshoots of those qualities, yes. But by themselves evil? Na, I don't think so.
I believe that people are both good and evil.
I believe that people are generally "meh" about the whole thing: neither good nor evil.
"What can be asserted without proof, can be dismissed without proof."-Hitch.