This work investigates how economic vulnerability, rather than inherent intellectual limitations, has historically dictated the societal treatment and institutionalization of individuals with intellectual disabilities in the United States. James W. Trent Jr. utilizes a comprehensive array of primary sources, including institutional archives, personal correspondence, and photographic evidence, to trace the evolution of terminology and policy over two centuries. He argues that the shifting definitions of disability—from 'idiocy' to 'intellectual disability'—reflect broader economic anxieties and the desire to manage marginalized populations through state-sponsored services.

Scholars and historians frequently cite this text as a foundational study in the field of disability history for its rigorous archival research. Readers often note that the prose is accessible yet academically dense, providing a necessary critique of how societal structures define and marginalize intellectual difference.