Individual versus group selection results in a mix of altruism and selfishness, of virtue and sin, among the members of a society. – E. O. Wilson
All of us in society are supposed to believe that cruelty to animals is wrong and that it is a good thing to prevent needless suffering. So if that is true, how can meat be acceptable under any but the most extraordinary circumstances, such as perhaps roasting the bird who died flying into a window? – Ingrid Newkirk

