Displaced Sudanese wait for a medical checkup in front of the Turkish Red Crescent Hospital in Darfur city of Nyala 21 February 2007. (Mustafa Ozer AFP/Getty)

What Makes a Person Care About Someone Else?

Displaced Sudanese wait for a medical checkup in front of the Turkish Red Crescent Hospital in Darfur city of Nyala 21 February 2007.

Credit: Mustafa Ozer AFP/Getty