It really depends on which philosopher you're willing to quote. The Enlightenment had some people convinced that we're inherently good, others claimed we were all dicks in the making. I don't exactly remember who coined the phrase "State of Nature" to designate the initial, natural condition of Man and of how that supposedly involves innocence, but I do know that others later said that the State of Nature was a lot more ruthless, a lot more cruel.
To clarify, I'd say it's a question of whether or not civilization corrupts or civilizes us. Are we born as innocent widdle babies or are we actually apex predators kept in check by weird societal notions we developed and that the rest of the animal kingdom didn't bother to push quite as far?
*checks his old college notes* Right. So the State of Nature was penned by Thomas Aquinas, but most people know it from the writings of Jean-Jacques Rousseau. He says people are neither good nor bad. "Evil" behavior is a product of society, but our intrinsic nature forces us to look to ways to congregate, whether you're talking about hunting bands, villages or modern cities. So, basically, we can't avoid being dicks, not unless we turn into complete recluses.
And, well, it's kinda hard to be a dick to anything or anyone when you're all alone for miles on end.