What if Lincoln didn't abolish slavery? What if an assassin succeeded in killing FDR in 1933? This volume presents 25 intriguing "what if..." scenarios by some of today's greatest historical minds-including James Bradley, Caleb Carr, James Chace, Theodore F. Cook, Jr., Carlos M.N. Eire, George Feifer, Thomas Fleming, Richard B. Frank, Victor Davis Hanson, Cecelia Holland, Alistair Horne, David Kahn, Robert Katz, John Lukacs, William H. McNeill, Lance Morrow, Williamson Murray, Josiah Ober, Robert L. O'Connell, Geoffrey Parker, Theodore K. Rabb, Andrew Roberts, Roger Spiller, Geoffrey C. Ward, and Tom Wicker.