A member of the Dinka tribe from Bor attends the final of Sudan's first commercial wrestling league between his tribe and the Mundari from Central Equatoria at a stadium in the southern Sudanese city of Juba on December 18, 2010. The traditional sport has been embraced as a way to increase unity among southern tribes torn apart by cattle raiding conflicts. By Trevor Snapp/AFP/Getty Images.
The U.S. is particularly miserable at putting aside money for the future. Should we blame our paychecks or our psychology?