the.com/shrewdness

The word for cleverness, and also what you call a group of apes — nature's inside joke.

means Sharp, practical intelligence — the kind that reads situations correctly and knows how to turn them to advantage.

from From 'shrewd,' which originally meant wicked or malicious — borrowed from 'shrew,' the small, sharp-toothed mammal long (and unfairly) believed to have a venomous, vicious bite. Over centuries 'shrewd' softened from 'evil-natured' to 'cunning' to today's more complimentary 'astute.' The collective noun 'a shrewdness of apes' is a much later, playful coinage, part of the old English tradition of inventing fanciful group-names for animals — nature's joke being that the apes didn't ask for the compliment.

collective noun
A group of apes is a shrewdness
root origin
From shrew, once thought sly and malicious
irony alert
Shrews are actually nearly blind and dim
modern use
Now means sharp practical judgment, not malice
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