Afterword: Evidence over Interests

After years of science education, teaching experience, and research practice, which focused on the use of non-human primates as potential models of human psychological disorders, a young student in my primate behavior class amiably, but insistently, suggested my preparation was incomplete. She asked me to read Peter Singer’s book <i>Animal Liberation</i> , which had been published two years earlier, in 1975. I had been lecturing in class about the effects of early experience on the rhesus monkey’s ( <i>Macaca mulatta</i> ) social and intellectual development, and my descriptions of the invasive research interventions and behavioral consequences encouraged her to make the book suggestion.