An interesting quote on evolution

[Jackalope]

That depends on the environment. Here in our nice regulated cities we sit at the top of the food chain (actually more of a food web). Take a trip to somewhere like the Amazon, where huge carnivorous spiders are king, and you'll learn rather quickly your place on the menu.

Indeed. Traipse through the savannas of sub-Saharan Africa on foot for a few weeks and see how secure you feel at the "top of the food chain".

There's a reason our distant ancestors spent much of their time in trees.