The American Council of Learned Societies on two separate occasions supported my research on this project, and I am therefore doubly grateful to the Council. I wish also to record my appreciation for a John Simon Guggenheim Memorial Foundation fellowship that allowed me to devote an uninterrupted year to writing. My thanks go as well to five bodies at Stanford University which contributed materially to my work on this book: the Hoover Institution on War, Revolution and Peace; the Center for Research in International Studies; the Graduate Division; the School of Humanities and Sciences; and the Institute of American History.
I was fortunate to have two research assistants, William T. Generous, Jr., in the initial stages of research, and Daniel B. Smith, in the final stages, whose thorough professionalism added substantially to my understanding of the war era. Several colleagues generously responded to my appeals for critical readings of various sections. John Morton Blum read an early version of almost the entire manuscript. Carl N. Degler and David B. Tyack offered valuable suggestions about Chapter Two. William M. Chace twice gave me the benefit of his customarily wise counsel on the material that comprises Chapter Four and part of Chapter One. James Hoopes rescued me, I hope, from some errors in that same material. Robert O. Keohane rescued me, I know, from even larger errors in Chapter Six. Thomas A. Bailey on numerous occasions shared with me his encyclopedic knowledge of American history, and of the World War I period in particular. Susi Lilly and Emily Hallin deciphered my drafts and rendered them legible. To all of them, my warmest thanks.