This book doesn't get five stars because it's perfect, or because I agree with everything in it, but because it's such a brilliant example of what a work of political science can be. Lowi combines clarity, insight, and passion in addressing the transformation of American government that occurred in the 20th century. Lowi argues that the reigning, even if sometimes unrecognized, American ideology is "interest group liberalism." Having given up on the idea of a common good that exists separately from whatever compromises various interests can agree to, these compromises are themselves held up as the common good. Much of the detailed work of policy making is done by regulatory agencies, who are themselves often led and staffed by people who have worked for, and have ties to, the interests they regulate. Congress tends to enact legislation with broad goals, and passes responsibility for the details off to the agencies. The last chapter proposes Lowi's alternative to interest group liberalism, "juridical democracy", that sounds somewhat conservative, but is appealing to anyone who believes in open government and deliberative democracy. (Although I fear it would result in a government that never gets a damn thing done.) This is a very quick and dirty summary, that can't do justice to this important book.