...by focusing on mother-baby relationships, Denworth misses the fact that social brains can and do develop in the absence of mammal-style parental care.

... [a] deft exploration of the biology of a 'fundamental bond'.

In an accessible and enlightening style, she takes us with her on her journeys to primatology research sites.

In a personable and accessible style, Denworth lays out her argument, exploring the biological underpinnings and the evolutionary history of friendship.

...critical and convincing.

Science writer Denworth takes a broad look at the origins and functions of friendship in her intriguing debut.

In addition to examining the scientific underpinnings of friendship, Denworth capably demonstrates how loneliness, an increasing hazard as Americans age and lose friends and family, is truly a health- and life-threatening condition, and there are things to be done to avoid it. Convincing evidence that evolution endowed us with a need for friends, support, comfort, stimulation, and, ultimately, happiness..