@Cofty: to be fair, I think Shelby was talking about dependent relationships between organisms, like food webs, symbiosis, and the oxygen/carbon dioxide cycle between plants and animals. That much is true. However, this is like irreducible complexity and fine tuning arguments, wherein the parameters of life being met by the environment are considered evidence of design. The thing is, we EVOLVED (and life originated) to live within the parameters which were there to begin with. Had the parameters been different, life as we know it would be different, not non-existent. @Sab: I would say nature is purposeful in selecting us to be the most highly intellectual beings on Earth, but for reasons not relating to anything SUPERNATURAL. Obviously, there are many advantages to higher intelligence. Intelligent life forms are experts in manipulating the very environments which would otherwise control them. High intelligence allows for complete role-reversal and thus excellent chances for survival. Also, for my two cents about animal suffering, I believe animals suffer just as much as we do physically. The emotional aspect of said suffering is what is questionable. I don't think animals (with the exception of hominids, and possibly chimps and bonobos, as well as other higher primates--"higher", in this sense, would indicate greater capacity for such things anyway, by definition)suffer and think, "Oh, the HUMANITY!"