Margaret MacMillan is Professor Emeritus of International History at Oxford University and the author of War: How Conflict Shaped Us and The War That Ended Peace: The Road to 1914.

Americans once associated spheres of influence with a cynical, volatile European past. Now Washington is resurrecting them.

In a new book, the mathematical epidemiologist Adam Kucharski explains how certainty, even in math, can be an illusion.

The second volume in Pulitzer-winning historian Rick Atkinson's planned trilogy on the American Revolution publishes Tuesday.