One common strategy on which we should all be able to agree is to take steps to reduce the risk of human extinction when those steps are also highly … - Peter Singer

September 11, 2001, was just another day for most of the world’s desperately poor people, so presumably close to 30,000 children under five died from these causes on that day—about ten times the number of victims of the terrorist attacks. The publication of these figures did not lead to an avalanche of money for UNICEF or other aid agencies helping to reduce infant mortality. In the year 2000 Americans made private donations for foreign aid of all kinds totaling about $4 per person in extreme poverty, or roughly $20 per family. New Yorkers who were living in lower Manhattan on September 11, 2001, whether wealthy or not, were able to receive an average of $5,300 per family. The distance between these amounts encapsulates the way in which, for many people, the circle of concern for others stops at the boundaries of their own country—if it extends even that far.

Since ancient times, philosophers have maintained that to strive too hard for one's own happiness is self-defeating.

Human social institutions can effect the course of human evolution. Just as climate-change, food supply, predators, and other natural forces of selection have molded our nature, so too can our culture.