No one has even touched this topic, but a discusion came up in the another topic
http://www.rifftrax.com/smf/index.php?topic=1901.msg49391#msg49391 about stuff that relates to Ishmael, so I'll continue it here.
I've been asked to list the laws of nature.
Here it is, as good as I can explain it.
A creature may compete the best it can to catch its food. But it may not seek out competition and kill it (unless the creature plans on eating the competition it kills). It also may not destroy the competition's source of food. Also, a creature may not take more than it's going to eat.
This general rule keeps each species in a certain harmony with each other. They are competing, but they don't wipe out the competition. This promotes diversity, something that is incredibly important in nature.
Most native people's followed this rule. They only took what they could use, and didn't kill off species of animal just because they would eat their food. They didn't have to. Food was all around them. They just had to work to hunt and gather it. Like Sarcasm said, the earth provides plenty of food.
Our society does not live within this rule. And it seems to benefit us. But what it really does is allow for an unchecked population. Unlike global warming, you can't deny that the earth is going to be overpopulated sooner or later. Right now we are betting that science will fix it sometime soon. I doubt it.