Franz Joseph Gall (1758-1828) was always a controversial figure, as was his doctrine, later called phrenology. Although often portrayed as a discredited buffoon, who believed he could assess a person's strengths and weaknesses by measuring cranial bumps, he was, in fact, a serious physician-scientist, who strove to answer timely questions about the mind, brain, and behavior. In many ways a remarkable visionary, his seminal ideas would become tenets...