This work investigates the rise and eventual decline of phrenology as a dominant cultural and scientific movement in 19th-century America. John S. Davies examines how a theory linking skull shape to character traits transitioned from a legitimate scientific pursuit to a popular social fad. By analyzing the intersection of early psychological theory and public enthusiasm, the author demonstrates how phrenology shaped American social reform and intellectual discourse during the Victorian era.

The text provides a detailed historical account of the phrenological movement, framing it as a significant reflection of 19th-century American intellectual priorities. It serves as a specialized resource for those interested in the history of science and the evolution of social pseudoscience.