This is the sixth blog post in this series. The previous five were published in February, July, and October 2015, and January and May 2016, and highlight earlier academic findings. This post was coau…

CFR.org editor Bob McMahon and I recorded our annual summer reading episode of CFR’s “The World Next Week” podcast last week. Gayle Tzemach Lemmon, senior fellow for Women and Foreign Policy and best…

The United States has fought twelve major wars and numerous smaller skirmishes in its history. Memorial Day is how we honor the soldiers, sailors, airmen, airwomen, and marines who did not return hom…

What if? Those two words are easy to ask, whether about our own lives or world history. But the answers can be haunting—a different choice might have created a better opportunity or prevented a trage…