In addition to the typical class lectures, MIT campus organizations sponsor several lecture series that bring noted speakers to campus. One of the most prestigious, the Compton Lecture Series, named for MIT President Karl Taylor Compton, originally brought one lecturer to campus for a residency of at least a week, giving three lectures on a general subject for the entire campus community and several more specialized seminars. Today the Institute invites one or two distinguished scientists, politicians, activists, and artists from around the world to present a single lecture on a topic of significance. Over the past 50 years, the major theme has been the role of science and technology in society. Paul A. Samuelson, an Institute Professor and the first American to win the Nobel Prize in economics, gave the 1969 lecture as a conversation with Milton Friedman, debating old and new systems of economics and monetary policy.