 Note on the text: Locke’s theory of freedom is contained in Book II, Chapter xxi of An Essay Concerning Human Understanding. The chapter underwent five revisions in Locke’s lifetime [E1 (1689), E2 (1694), E3 (1695), E4 (1700), and E5 (1706)], with the last edition published posthumously. Significant changes, including a considerable lengthening of the chapter, occur in E2; and important changes appear in E5.