Tom Woods is one of my favorite speakers (and authors). He’s a libertarian historian with a PhD from Columbia (undergrad at Harvard) if that’s possible to believe. He has an interest in economics and is especially good at explaining the implications of economics on historical events. He is very entertaining. If you’re only going to listen to one of his speeches, the one embedded below is the one (just because of the first two stories).
Download: Tom Woods 33 Questions Speech
If you like what you hear, then I’d suggest listening to all of his speeches on Mises.org (free RSS feed). Once you’ve exhausted those, you should consider signing up for his Liberty Classroom where you can here additional lectures series by him and other like minded professionals.