We humans pride ourselves on being the top of the food chain, complex in a way that no animal could emulate. But any anthropologist can tell you that, despite our unfathomable depths, most humans tend to follow general universal patterns. We all require air, food, money, etc. Most of us procreate, establish nuclear families, and eventually become dependant on either our accumulated resource reserves or the resources of those around us. Taken collectively, a sociologist will tell you that large populations also follow repetitive patterns.
Humans adapt to different, sometimes hostile environments.
We generally shun procreation outside of our own race. And like a gas, we seem to fill any space we inhabit, competing and consuming along the way. With a broad enough viewpoint, we start to look less like Earth's elite and more like just another evolutionary accident functioning on genetically pre-programmed instincts. A common Creationist argument runs that evolution doesn't exist because no one ever witnesses it. This limited view reflects one of our primary stumbling blocks with understanding evolutionary processes, both in the past and then extrapolating into the future.