This research was showcased by W. D. Hamilton and his theories on the evolution of sex, along with the Red Queen hypothesis and the idea of an evolutionary arms race between parasites and their hosts. Zimmer then discusses a final time the wide variety of parasites that evolved to have humans as their primary hosts and our attempts through scientific advancement to eradicate them.
W. D. Hamilton's research was showcased, exploring the evolution of sex, the Red Queen hypothesis, and the idea of an evolutionary competition between parasites and their hosts. Zimmer concludes by discussing a final instance of the diverse range of parasites that have evolved to rely on humans as their primary host, and our efforts through scientific advancements to combat them.