In postrevolutionary America, the autonomous individual was both the linchpin of a young nation and a threat to the founders' vision of ordered liberty. Conceiving of self-government as a psychological as well as a political project, jurists built a republic of laws upon the Enlightenment science of the mind with the aim of producing a responsible citizenry. Susanna Blumenthal probes the assumptions and consequences of this undertaking, revealing how ideas about consciousness, agency, and accountability have shaped American jurisprudence.

Focusing on everyday adjudication, Blumenthal...