While it is possible for intelligence to increase the range of benevolent impulse, and thus prompt a human being to consider the needs and rights of other than those to whom he is bound by organic and physical relationship, there are definite limits in the capacity of ordinary mortals which makes it impossible for them to grant to others what they claim for themselves.
Reinhold NiebuhrThe history of mankind is a perennial tragedy; for the highest ideals which the individual may project are ideals which he can never realize in social and collective terms.
Reinhold Niebuhr