If the U.S. wants to help people in tsunami-hit countries like Sri Lanka and Indonesia - not to mention other poor countries in Africa - there's one step that would cost us nothing and would save hundreds of thousands of lives. It would be to allow DDT in malaria-ravaged countries.

The conflict in Darfur could escalate to where we're seeing 100,000 victims per month

The intelligence community is so vast that more people have top secret clearance than live in Washington. The U.S. will spend more on the war in Afghanistan this year, adjusting for inflation, than we spent on the Revolutionary War, the War of 1812, the Mexican-American War, the Civil War and the Spanish-American War combined.

China was probably the worst place in the world to grow up female 100 years ago. There was foot binding, female infanticide, concubinage, and child marriage, and now it's one of the better places. So I really do feel that we're on the right side of history here.

While Americans have heard of Darfur and think we should be doing more there, they aren't actually angry at the president about inaction

Look, we'll have to confront the pathologies of poverty at some point. We can deal with them cheaply at the front end, in infancy. Or we can wait and jail a troubled adolescent at the tail end. To some extent, we face a choice between investing in preschools or in prisons.

Just a little help, a small security force, a bit of food, can save lives