Primate social organization is more flexible than previously assumed. According to a new study, the first primates probably lived in pairs, while only around 15 percent of individuals were solitary.

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According to the authors, their constructive model, guided by social scientific theory, can provide the basic mechanistic explanation of social evolution and integrate theories of the social sciences.

For decades, researchers have said that our mammalian ancestors were solitary but a new analysis turns that thinking on its head, suggesting they were far more sociable than was previously thought.