What is it like to grow up on a kibbutz?

My uncle Uri on way to work in the avocado plantation, 1968

I can’t claim to have grown up on a kibbutz, but I do have the benefit of experiencing life as a child on a kibbutz and elsewhere (several other elsewheres, as it happens), so I can gauge how it was by comparison.

How profitable is it to learn physics?

(My answer to this question at Quora.com)

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Before you ask any question along the lines of How profitable is it to do X?, have a look at the diagram for ikigai, which is the Japanese concept meaning “reason for being”: