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They used to call it “wool sorter’s disease” or “hide-porter’s disease” because the affliction struck workers who spun wool or carried animal skins.

"Basically, yes, though it's more complicated than that. Robin Dunbar is an anthropologist at Oxford who thinks we operate, socially, with circles of different sizes.

Contrarianism is a tricky thing. Challenging the conventional wisdom – something ACSH routinely does – is necessary because popularly held beliefs are often wrong.