Last year, Michael Sandel made a splash when he put online his popular Harvard philosophy course, Justice: What’s the Right Thing to Do? Over the past 30 years, more than 14,000 Harvard students have taken his course. And now you can access the course online at no cost. (Details here.) In recent days, Sandel has surfaced one again, this time on Philosophy Bites (iTunes - Feed - Web Site), a British podcast that features top philosophers being interviewed on bite-sized topics. In this conversation (listen here or below), Sandel and Nigel Warburton tackle some big questions: What are the limits of free market thinking, especially when it comes to what we can do with our bodies in the marketplace? Can we sell blood consensually? Perhaps. But what about selling our kidneys on the open market? Or "renting wombs"? (There are whole villages in India where women act as "paid surrogates" for Western couples.) Or what about consensual prostitution? Or engaging, however willingly, in degrading forms of wage labor? Are these inherent freedoms, as some free market/libertarian thinkers might hold? Or do these acts violate our collective sense of the "good life"? And do they diminish our freedoms in some kind of larger sense? The conversation gets more heated (in a good way) as it goes along. Give it some time, hang with it, and see what you think. For more philosophy, see our collection of Free Philosophy Courses.