This engaging and original study, by one of the leading scholars of rational choice theory, explores the course of British parliamentary politics over the last 150 years. It combines social science and analytical narrative history with the great turning points in British politics: the Repeal of the Corn Law; the Victorian crisis of the Liberal and Conservative Parties; the Irish Question and Lloyd George's solution to it; the New Liberal origins of the welfare state; the politics of race and empire under Chamberlain and Powell; and the politics of "there is no alternative" under Margaret Thatcher.