Introduction : a conversation with Captain Preston -- Early America : visions of the founders, 1607-1775 -- A republic united : the search for a common vision, 1776-1840 -- A nation divided : freedom against liberty, 1840-1912 -- A world at war : a free society and its enemies, 1916-1945 -- A people among others : global visions of liberty and freedom, 1945-2004 -- Conclusion : the view from Tocqueville's terrace.