Something that I've actually enjoyed while listening to the program. Not so much Dan Barker's singing, but the other artists who are free thinkers whose works get mentioned and played makes a list too long to get into here.
Amongst the regular recurring songs (Ain't it the Truth, It Ain't Necessarily So, etc.) were several other songs I'd never heard before, including one by John Lennon (Found Out) and one by XTC (Dear God) I'm going to have to pick up an XTC album.
2006 Archive episode.
December 30, 2006 - Steven Pinker - Ghost in the machine? He doesn't think so. The staggering complexity of the neural network in the brain is enough to explain consciousness. I don't know that I agree with his argument, but he makes a pretty good case.
Several songs featured in this episode as well. Dan Barker's rendition of Die Gedanken sind frei most prominently. Also a tribute to Auld Lang Syne composer Robert Burns at the end of Freethinkers Almanac.