This Essay introduces a Review Symposium for Philip Goodman, Joshua Page, and Michelle Phelps’s Breaking the Pendulum, a book that challenges the centrality of the pendulum metaphor that scholars, journalists, and politicians have used to describe significant shifts in the overall orientation of punishment nationwide. Drawing on recent research, Goodman, Page, and Phelps lay out the case for abandoning this metaphor as well as its associated theory of penal change, offering in its place an “agonistic perspective.” Using this agonistic perspective as well as research on the topic, I suggest some reasons why the pendulum metaphor may still be a fruitful site of interrogation. Specifically, I argue that, while recognizing the caveats illustrated by Goodman, Page, and Phelps, we should take seriously the pendular pattern of US penal history told at the national level and we should not dismiss the mechanical causes of penal change in our efforts to populate theories and accounts of penal change with individual and group actors.