This chapter begins with an exploration of the production and development of eugenic discourses, explicitly adopted by institutions at the beginning of the 20th century and subsequently reaching their height during the Nazi regime, Though officially condemned, these discourses continued to influence service provision after 1945, when most people with intellectual disabilities who did not live with their families had to live in psychiatric hospitals or large Christian or state-run institutions. Parent-led organisations, developing from the mid-1960s, led to the first significant change in quality of services for persons with intellectual disabilities. In the late 1970s, the adoption of new ideas of normalisation and integration led to the implementation of de-institutionalisation programmes. These however left some large institutional settings untouched and, despite several policy changes and efforts to create a more personalised system of care since the 2000s, the institutional system of service provision continues to cause serious problems, and eugenic discourses and practices endure.