Integralism is the application to the temporal, political order of the full implications of the revelation of man’s supernatural end in Christ and of the divinely established means by which it is to be attained. These implications are identified by means of the philosophia perennis exemplified in the fundamental principles of St Thomas Aquinas. Since the first principle in moral philosophy is the last end, and man’s last end cannot be known except by revelation, it is only by accepting the role of handmaid of theology that political philosophy can be adequately constituted. Integralism: A Manual of Political Philosophy is a handbook for those who seek to understand the consequences of this integration of faith and reason for political, economic and individual civic life. It will also serve as a scholastic introduction to political philosophy for those new to the subject. Each chapter finishes with a list of the principal theses proposed.