Study of 1,400 Mammals Links Social Living to Longer Lifespans

2 articles · Updated · The Brighter Side of News · Jun 29

More than 1,400 mammal species in a global analysis showed pair-living and group-living species tend to outlive solitary ones, with little added lifespan gain once species move beyond pairs.
Body size still strongly predicts longevity, but researchers found social behavior lifts lifespan above what size alone would suggest by reducing mortality through shared vigilance and the dilution effect against predators.
Larger groups may not extend life further because closer contact raises pathogen transmission and can intensify competition for food and mates, offsetting the benefits of extra sociality.
Published in Ecology and Evolution, the study used statistical controls for shared ancestry and suggests social organization is a major factor in aging, with possible implications for conservation and human health.