Just what did isolationists think—and say—in the early twentieth century? Christopher Nichols provides some provocative answers to that question in Promise and Peril, which is far more intellectually venturesome than its textbookish title suggests. Nichols has written a rediscovery of the isolationist tradition, a thorough and timely account of thinkers as diverse as William James, W. E. B. Du Bois, Randolph Bourne, Eugene Debs and Jane Addams… Nichols has accomplished a major feat, demonstrating that isolationism was a far richer and more complex intellectual tradition than its critics have ever imagined—one that still speaks to our own time, freshening the stale formulas of the Washington consensus and allowing us to reimagine the role of the United States in the world.