The Commitment to Development Index ranks 27 of the world’s richest countries on policies that affect more than five billion people living in poorer nations. How did your country do this year?

While global development is about much more than aid, US foreign assistance is, and will remain, one of the most visible tools for US development policy in many countries. The US government spends less than 1 percent of its annual budget — about $23 billion — on nonmilitary foreign assistance across...