Discussing classical legal positivists this book comprises a study of their work which is situated in relation to the modern tradition in legal philosophy. In this way, it is demonstrated that the theorists adhered closely to the natural law standpoint in legal philosophy, while also defending the particular view of the proper functions of law and the state that distinguished the tradition of modern liberalism. The author has also written "The Redefinition of Conservatism".

The Defence of Natural Law comprises a study of the philosophies of law expounded by Lon L. Fuller, Michael Oakeshott, F.A. Hayek, Ronald Dworkin and John Finnis. The work of these theorists is situated in relation to the modern tradition in legal philosophy. In this way, it is demonstrated that the theorists adhered closely to the natural law standpoint in legal philosophy, while also defending the particular view of the proper functions of law and the state that distinguished the tradition of modern liberalism.