Are people inherently evil?

[Farsala]

There isn't really good or evil, it is just humans trying to define things.

Keeping it simple, lets say all the humans killed each other. Some might think it would be an evil act, but in the end without humans some animals would flourish which would be thought of as a good act. And with a new animal on top of the food chain some animals would falter and perhaps go extinct, a bad act.

So what is an evil action + a good action? just an action. I think all actions will have an upside and a downside.