This week’s podcast is a rebroadcast of a show about human nature and circumstance, “Fear Thy Nature.” (You can subscribe to the podcast at iTunes, get the RSS feed, or listen via the media player above. You can also read the transcript, which includes credits for the music you’ll hear in the episode.) The episode is about how profoundly human behavior is influenced not only by our inner bearings but our outer circumstances. It centers on the fascinating show Sleep No More, created by the British theater group Punchdrunk; and the famous 1971 Stanford Prison Experiment, in which student volunteers were asked to play the role of inmates and prison guards. What do the SPE and SNM have in common? Give a listen to find out.