'I've been listening to this live Doors album, and in between two of the songs, Morrison goes 'alright, alright, alright, alright' ' You can save this article by registering for free here. Or sign-in ...

Great eras are often marked by a famous adage. For the Enlightenment Era, just after the Renaissance swept Europe, it was the axiom coined by Descartes: “Cogito, ergo sum” (“I think, therefore I am.”) ...