***See post 161.***
That doesn’t really answer the question unless you consider mankind as just another species scrabbling in the dirt.
Yes. More or less. It's the evolution of superior intelligence and the invention of culture that separated us somewhat from the animals, but we are capable of getting back there in the wild just as comfortably as the animals are, and you know it. A mere veil separates civilization from the jungle.
Watch these:
http://www.youtube.com/watch?v=7oVhopPjTNg
And