Evolution and Homosexuality

For a semester at Clark I was asked to organize the weekly 'recitations' for Introductory Psychology. The course itself was quite large, but the recitations were run by upper-level undergraduates, and contained 20-30 students. I transformed several weeks into lab activities. For others, I organized more formal discussion activities. When the main course was discussing evolutionary psychology, a student asked about how homosexuality could be explained from an evolutionary point of view. This student, and several others in class, seemed to see the existence (or at least the relative normality) of homosexuality as proof against the usefulness of evolutionary theory as an explanation of behavior. For that week, I prepared the following discussion paper for students: