Liberalism

For a good overview of the main ambitions, doctrines, and development of liberalism from the 17th to the 19th century, listen to this recording of Bertrand Russell, "Philosophical Liberalism," from his great History of Western Philosophy (1945)

Liberalism is, of course, the political doctrine which emphasizes liberty or freedom above other values. For a good discussion of various facets of freedom and human nature, listen to this recording of a 1974 conversation between the liberal philosopher Isaiah Berlin and John Merson.