Conservative ideology in its moderate form is inspired by opposition to belief in radical political and social change on the ground that it rests on several mistaken assumptions, of which the most important are that human nature is highly malleable; that human will can refashion history in whatever ways human ideals may require; that society is the artificial product of a contract between autonomous individuals; and that evil is an eliminable feature of human existence. The unifying theme of conservative ideology, by contrast, is a defence of limited politics, although different schools of conservatism have theorized the concept of limit in ways that are incompatible and even incoherent. Of these, the four principal schools are the reaction...