Blum explores a complex middle ground in the controversy over using animals for medical experimentation.

Deborah Blum examines the history of love through the lens of its strangest unsung hero: a brilliant, fearless, alcoholic psychologist named Harry Frederick Harlow. Pursuing the idea that human affection could be understood, studied, even measured, Harlow (1905-1981) arrived at his conclusions by conducting research--sometimes beautiful, sometimes horrible--on the primates in his University of Wisconsin laboratory. Paradoxically, his darkest experiments...