A human being should be able to change a diaper, plan an invasion, butcher a hog, conn a ship, design a building, write a sonnet, balance accounts, build a wall, set a bone, comfort the dying, take orders, give orders, cooperate, act alone, solve equations, analyze a new problem, pitch manure, program a computer, cook a tasty meal, fight efficiently, die gallantly. Specialization is for insects.
-Robert A. Heinlein
also
Of those, I would say only the following are necessary:
set a bone, comfort the dying, cooperate, act alone, analyze a new problem, pitch manure, cook a tasty meal.
The rest are just expressions of civilization – Heinlein seems to think that civilization *is* humanity. I disagree.
“Plan an invasion” is, frankly, abhorrant.