The book "Measuring Manhood Race and the Science of Masculinity 1830-1934" by historian Joanna Diane Cohen offers a comprehensive analysis of how the concept of masculinity was measured and understood during this time period. The book delves into the historical context of the development of scientific theories and their impact on society, highlighting the ways in which these ideas have shaped our understanding of gender roles and expectations. The plot revolves around the idea that the measurement of manhood has been a central concern throughout history, with various methods employed to determine what constitutes a 'real man'. These measurements have evolved over time, from physical characteristics such as height and weight to more subjective qualities like strength and courage. The book explores how these definitions have been influenced by societal norms and cultural values, and how they have changed over the centuries. One of the key themes of the book is the role of science in shaping our understanding of masculinity. Cohen examines how scientists and medical professionals have contributed to the development of these measurements, often using flawed or biased research methods to support their claims. She argues that these flawed assumptions have had far-reaching consequences, influencing everything from education to employment opportunities for men and women alike.

''