What If? [395 pages] of What If? by Stephen E. Ambrose and John Keegan and David McCullough and William H. McNeill and Victor Davis Hanson and Josiah Ober and Lewis H. Lapham and Barry S. Strauss and Cecelia Holland and Theodore K. Rabb and Ross Hassig and Geoffrey Parker and Thomas Fleming and Alistair Horne and Theodore F. Cook Jr. and Stephen W. Sears and David Clay Large and Arthur Waldron and James M. McPherson