I would add creativity, novelty, innovation whatever as number 4.
It is rare and should be nurtured.
I have known people with a huge fund of knowledge but not a novel thought in their head. they do very well in the world
Some people have the capacity for novel thinking, synthesis -that makes for new products, disease cures, more efficient food supplies, poollution free energy, innovatinve educational process etc and the world sucks it right out of them.
Others work in these fields with derivitive ideas and make scant progress.
I think it starts with being forced to color in the lines and goes out from there. the creativity drain that is...
