We live in a "mutual eating" society first and foremost, an ecosystem. To make changes to the system in benefit of one actor (ie., humankind) is to impose an imbalance into an already orderly system. Death and destruction, regardless of how much we try to fight them, are inherent parts of the process. From this, I'm not sure if the "casual environmentalist" is truly selfless and accepting enough to put the planets needs over those of his own, or is he?