I think we need to change the phrase "breed like rabbits" to "breed like humans," as no other species on this planet even comes close to the human reproduction rate. As our population grows, available land shrinks and more and more people are forced to live in crowded, urbanized environments, a situation ripe for the easy spread and emergence of infectious agents.
Narcissism has become a defining feature of the human species. While it is a "sick" way of being in the world, it is maladaptive, not absolute. We each can continue to adapt. By choosing to change the way we think and behave, we each can heal what ails the larger organism of which we are a part so we all can be healthier in all ways.
Last Monday's San Francisco Chronicle front page reported a now oft-asserted but completely Bizarro world assertion that California's Prevention of Farm Animal Cruelty Act (2008's Proposition 2 which was passed by the voters and is now law) has made the world a nice place for farmed chickens. Come on.