This episode of the radio show 'More or Less', available in podcast, has a nice discussion of Arrow's impossibility theorem. It's a consistently good show for anyone interested in quantitative social science, especially how to teach it.
http://www.bbc.co.uk/podcasts/series/moreorless/
Ben is currently an assistant professor in the Department of Environmental Studies at Knox College. He received his PhD in Political Science from Binghamton University in 2014. Ben was previously a visiting assistant professor in the Department of Political Science at Hobart and William Smith Colleges, and previously held a research position in the Department of Political Science at Fordham University. His research and teaching interests are centered around parties and interest groups, particularly those from under-represented constituencies. A great deal of his work deals with the political organizations of the environmental movement. He studies both American and Comparative politics.