Jerome Frank was an influential American psychiatrist and legal scholar, known for his work in the field of law and mental health. He was a prominent figure in the development of the concept of mental illness and its implications for legal responsibility. His ideas helped shape the understanding of how psychological conditions can affect behavior and decision-making. In addition to his contributions to psychiatry, Frank was a key advocate for the integration of psychological principles into the legal system. He emphasized the importance of considering mental health in legal contexts, influencing both criminal law and civil rights discussions throughout his career.