- Lynn Hunt, Inventing Human Rights: A History (New York: W. W. Norton & Co., 2007)
- Voltaire, Treatise on Toleration (London: 1779) [electronic book]
Benjamin Kaplan, Divided by Faith: Religious Conflict and the Practice of Toleration in Early Modern Europe (Belknap, 2010)
Dale Van Kley, The French Idea of Freedom: The Old Regime and the Declaration of Rights of 1789 (Stanford, 1994): esp. chaps 3 and 7 for religion.
John Locke, A Letter Concerning Toleration, widely available online.
Rainer Forst, Toleration in Conflict: Past and Present (Cambridge, 2013).
Perez Zagorin, How the Idea of Religious Toleration Came to the West (Princeton, 2003).
Ole Peter Grell and Roy Porter, Toleration in Enlightenment Europe (Cambridge, 2000).