54 -An Encyclopedia of Everything

The Brethren of Purity, or Ikhwan al-Safa' were one of the most mysterious, yet influential groups of philosophers.  A secret society of eclectic thinkers, they attempted to reconcile all the world's knowledge--from Greek, Hindu, Persian, pagan, Christian and Muslim sources--into a single system that explained everything.  How did they do?  We will see in this episode.