Matt Gatton has proposed that the camera obscura is the origin of all art.
His arguments are quite resonant, and explain phenomena seemingly as disparate as the Pyramids and Plato’s Allegory of the Cave. Best of all, he’s no crackpot!
[An academic aside… I find this to be such a great intellectual leap that I figured Matt would be associated with DXARTS or MIT. He has “held adjunct positions at the University of Louisville and De La Salle University and is an artist-in-residence at St. Francis High School in Louisville, USA.” How refreshing that such original work can occur outside of our preconceived “elite!” Gives me hope!]