In The Birth of the Republic, 1763–89, Edmund S. Morgan shows how the challenge of British taxation started Americans on a search for constitutional principles to protect their freedom, and eventually led to the Revolution. By demonstrating that the founding fathers' political philosophy was not grounded in theory, but rather grew out of their own immediate needs, Morgan paints a vivid portrait of how the founders' own experiences shaped their passionate convictions, and these in turn were incorporated into the Constitution and other governmental documents. The Birth of the Republic is the classic account of the beginnings of the American government, and in this fourth edition the original text is supplemented with a new foreword by Joseph J. Ellis and a historiographic essay by Rosemarie Zagarri.