Joan L. Richards is Emerita Professor of History and Director of the Program of Science, Society, and Technology at Brown University, where she worked for over thirty-five years. Her work is infused with an abiding interest in the ways in which mathematics has served as a model of thinking that has developed in interaction with other approaches to the human mind, be they psychological, spiritual, physical, or even phrenological. Her book on the extended De Morgan family, Generations of Reason: A Family’s Search for Meaning in Post-Newtonian England, was published by the Yale University Press in 2021.