This text is part of the series "Founders of Modern Political and Social Thought" which presents critical examinations of the work of major political philosophers and social theorists, assessing both their initial contribution and continuing relevance to politics and society. Each volume provides a clear, accessible, historically-informed account of each thinker's work, focusing on a reassessment of their central ideas and arguments. "Founders" encourage scholars and students to link their study of classic texts to current debates in political philosophy and social theory. This launch volume in the series presents a critical examination of St Thomas Aquinas' thought. John Finnis provides a richly-documented review of Aquinas' ideas on morality, politics, law, and method in social science, using the philosopher's own long-neglected distinctions between types of order and types of theory.