I find this to be a rather moot question, if humans are "inherently" something. If I am to give an answer in the framework of this, I'd say humans are inherently capable of both, if that wasn't obvious from observation.
In my personal belief, humans existed before birth as spirits - spirits that were neither good or evil, but had the potential to grow. I then believe life on earth is a tiny slice of eternity in which we are tried and challenged, all in an effort to grow.
In this way, I don't feel like humanity can be defined as good or evil, but only individuals.