Certain English writers of the seventeenth and early eighteenth centuries, whom scholars often associate with classical republicanism, were not, in fact, hostile to liberalism. Indeed, these thinkers contributed to a synthesis of liberalism and modern republicanism. As this book argues, Marchamont Nedham, James Harrington, Henry Neville, Algernon Sidney, and John Trenchard and Thomas Gordon, the co-authors of a series of editorials entitled Cato's Letters, provide a synthesis that responds to the demands of both republicans and liberals by offering a politically engaged citizenry as well as the protection of individual rights. The book also reinterprets the writings of Machiavelli and Hobbes to show that each contributed in a fundamental way to the formation of this liberal republicanism.