R Larson, a psychologist at the Massachusetts Institute of Technology, explains the human behaviour of queueing as some kind of regional adaptation. He finds it significant that in the London riots of 2011, looters adhered to the principle of ‘first come, first serve’. They queued to loot.

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Queues of humans can move or stay still. Queues of other animals, ants and penguins, for example, always move.zeile-der-ameisen-7134297 th-1