John Stuart Mill is one of the most significant theorists of democracy of all time. Against the backdrop of rich political and administrative experience, he formulated the principles of a liberal-democratic order. The fourth volume of the selected works includes, in addition to his brilliantly written reflections on representative government (1861), a series of groundbreaking essays on democratic theory. The volume is rounded off with a selection of Mill's most important letters on the central themes of his thought: morality, freedom, democracy, and equality.