A couple of points :
First , UGP clearly has no idea whatsoever just how what a mean-ass dog-eat-dog, survival of the strongest bitch that mother nature is.
He/She/It seems to has this conception that nature is all warm and friendly and the lion-lay-down-with-the-sheep in the mint patch type system. This is pretty much the opposite of what I've observed nature to be, having spent quite some time actually out there observing it.
Second , He/She/It really needs to figure out that "Free" doesn't exist. Everything has cost.
Indeed. Darwin frowns upon UP's rant as entirely untrue and unrealistic. The "watering hole" story is almost laughable.
Hippos HATE everything in a watering hole they have claimed as their own. They do not share.
Crocodiles use Watering holes to trap prey, knowing full well that something tasty will be by for a drink sooner or later.
About Feeding:
Watch any nature program where predator animals catch, kill and eat something. There is a pecking order as to who eats first, to who eats last. Why is that ? According to your rant there is no social hierarchy in nature. Even social insects such as ants and bees practice division of labor, and have a clear structure where some ants and bees are more important than others, and those on the bottom rung are expendable.
About Warfare:
Ever see two competing ant colonies go to war ? I have - its fascinating to watch. Did you know ants actually carry off their own dead and injured ?
Ants "domesticate" Aphids -- Sort of -- they keep them to eat their sugary secretions - the ants also use extreme behavior modification techniques to meet this goal - such as chemically drugging the aphids and eating their wings to keep them from flying away. The ants will occasionally eat an aphid or two as an example to the others.
Ants also keep other ants as slaves. Sanguinary ants will capture the unborn larvae from an enemy nest and then raise them as slaves.
So UP, your anti-human crap is just that, crap. The social orders and Usury you describe has existed long before mankind.