Eugenics combined science and politics to create social policies intent on “improving the stock” of some human groups at the expense of others. This module investigates eugenics as a history of science and technology operating in cultures around the world. It considers eugenics as a history of people creating, interpreting, rejecting, and suffering from decisions grounded in scientific (and pseudo-scientific - this boundary is important) practices supported by eugenics campaigners. Importantly, this module presents eugenics through the intersection of categories such as gender, race/ethnicity, ableism, class, nationalism, and political philosophy. Eugenics is a subject with strong local (UCL) connections, and it is a subject with diverse global involvements and impacts. Ultimately, this module explores the history of eugenics to better answer far-reaching questions about the role of science in policy development, about the power of science in public understanding, and about rival approaches to expertise in the knowledge economy.