Its real effort echoes my spontaneous reply to an academic in Amherst Mass, back in the 70’s, who demanded at a party what I would offer, since I rejected her PC touchy- feely course list. Having had too much to drink, my list was short, though not too bad for off- the cuff improvisation. I replied:
“Poetry, history, evolutionary biology, and how to use a chainsaw.”
Adjust for local conditions, ie rope a calf/ catch large fish for use a chainsaw…
Jack’s evolution through Classics , voracious reading, and river guiding wasn’t bad either. And I would definitely add at least a language, but preferably two– one familiar enough to be easy– French, Spanish– and one with at least a different alphabet– Russian, Chinese.