"Speak softly and carry a big stick" Theodore Roosevelt famously said in 1901, when the United States was emerging as a great power. It was the right sentiment, perhaps, in an age of imperial rivalry but today many Americans doubt the utility of their global military presence, thinking it outdated, unnecessary or even dangerous.

In The Big Stick, Eliot A. Cohen-a scholar and practitioner of international relations-disagrees. He argues that hard power remains essential for American foreign policy. While acknowledging that the US must be careful about why, when, and how it uses...

William Shakespeare understood power: what it is, how it works, how it is gained, and how it is lost. In The Hollow Crown, Eliot A. Cohen reveals how the battling princes of Henry IV and scheming senators of Julius Caesar can teach us to better understand power and politics today. The White House, after all, is a court-with intrigue and conflict rivalling those on the Globe's stage-as is an army, a business, or a university. And each court is full of driven characters, in all their ambition, cruelty, and humanity. Henry V's inspiring speeches reframe John F. Kennedy's appeal, Richard III's...