I don't necessarily think every thing humans have adopted is necessarily good for them, or the rest of the world's creatures. While agriculture allowed us to have a really dense population, is that actually a good thing in the end? Am I happier being a person driving a car 45 minutes to and from work each day, spending 8 or more hours in a florescently lit office than I would have been naked human armed with a stick? Probably not, I think I would have probably been just about as happy either way.