February 11, 2026

Baboon Sibling Rivalry Suggests Monkeys Experience Jealousy Like Humans

The New York Times Science
primates animal behavior jealousy evolution
A new scientific study examining baboon sibling dynamics has found evidence suggesting that monkeys experience jealousy in ways remarkably similar to humans. Researchers observed that baboons displayed behavioral patterns consistent with jealousy when a sibling received more attention or resources, echoing the sibling rivalry that is well-documented in human families.

The findings have significant implications for our understanding of the evolutionary origins of complex emotions. If jealousy is shared across primate species, it suggests the emotion is deeply rooted in our evolutionary history rather than being a uniquely human social construct. The research adds to a growing body of work exploring the emotional lives of non-human primates and challenges long-held assumptions about which feelings are exclusively human.
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