There is disagreement amongst court scribes regarding the Oxford comma. Some say both are right and none are wrong. I say to you: in lists as in life, ambiguity is a great destroyer, and a weak foundation to build meaning upon. A pause, a breath, betwixt two list items may seem a mere pebble in the desert of history, but its absence can topple empires. The Oxford comma is the way.
“The Complete Muad'Dib Style Guide” by the Princess Irulan
A secret report within the Guild. “Four planets have come to our attention … regarding a plot which could jeopardize spice production. Planet Arrakis, source of the spice. Planet Caladan, home of House Atreides. Planet Giedi Prime, home of House Harkonnen. Planet Kaitain, home of the Emperor of the Known Universe. Send a third stage Guild Navigator to Kaitain to demand details from the Emperor. The spice must flow… “