We're often outraged by disparities between the wealth and health of the United States and that of poorer countries around the world. And we're so often moved by a desire to do something about that global disparity.
What we are less aware of, however, is the fact that such disparities exist between communities in the United States. New research shows that life expectancies can vary by 25 years from one neighborhood to another in the same city. Inequity exists even in the richest countries.