Mastication is only one form of eating. As a Westerner, I consume a large portion of our world's resources in the form of energy, household goods, large appliances, transportation, gadgets, taxes to fund war efforts, etc.

As for imposing our will upon life, just look at factory farms, algae farms, dead zones in the sea, global warming, and war. Might is truly the final arbiter, and unless part of what we care about is the other, then we show a good track record of trampling them for our own uses.

Our present (relative) peace was brought about by people who felt the rights of others mattered, and had the might to back it up and impose it on those who felt differently.