Well, yeah. Its a good theory and I suspect the ancients were really smart.
Well, the ancients weren't smart enough to invent even the simplest form of pizza or the egg cream soda.
But to give credit where credit is due, the ancient Egyptians did invent all the sand-wich-is there and elsewhere wherever they are.
Ignorance can be fixed,
Stupid is forever.
When you think about it, Rogan is right. Most of us wouldn't last 2 months.
If you want to know the smart people in a room, watch as a joke gets told. The smart ones laugh first. Their brain seems to run at a faster clock rate, so they 'get there' first.
If you want an impartial test of smarts, get a book of jokes and a stopwatch.
I am surprised no one has figured this out before. Oh, wait, I used to be in Mensa... Never mind.