This book explores the wildly popular performances that told compelling stories about categories of people that scientific and social-scientific discourses increasingly described - and sometimes still describe - as biologically inferior. Although much work has emerged recently about the history of eugenics, this collection highlights the specific ways that modes of exaggerated commercial popular performances create a public conversation that mirrors pathological narratives of human difference that are now firmly established as the categories of normal and abnormal, healthy and diseased, beneficial and harmful. This connection between narratives of freakery and normalcy gesture towards a fuller understanding of how eugenic thinking has re-emerged strongly as a force in medical science and cultural thinking aimed at producing the supposed "best" and "most useful" kinds of people.