Mark Zuckerberg's 40th birthday bash gave us a glimpse of an alternate universe where Zuck and Bill Gates are college ... a black shirt that read "Carthago delenda est" in old English lettering.

Bill Gates left ... couch next to Zuckerberg, who is seated at a small desk with a laptop. He’s wearing a gold chain and a black T-shirt with the phrase Carthago delenda est on it.

This fixation on copying and weaponizing the "Stories" feature wouldn't have been out of place in the Bill Gates era at Microsoft, and it establishes Mark Zuckerberg as the same kind of leader.