The struggle for human freedom aginst the unbridled power of Church or State was for Lord Acton (1834-1902) the central theme of history. And to him, no era in history is more congenial than the period from the Renaissance and Reformation to the American Revolution. A great Catholic liberal and an impartial historian who treated with candor the awkward problems of Church and State, he was one of the most brilliant and influential scholars of his age.