In the early twentieth century, Conway Lloyd Morgan warned psychologists against describing the behavior of animals in terms of their mental deliberations. In particular, he suggested that animal psychologists should not call behaviors choices unless they had good evidence that the animals were actually choosing—a dig at Darwinian’s theory of sexual selection (Morgan 1909). A century later, Joan Roughgarden also seeks to discredit Darwinian sexual selection. Unlike Morgan, however, she offers in its place a complex vision of what animal minds are capable of accomplishing—a cooperative model of the evolution of social behavior in which everybody gets to choose, not just females.