''In the 20th century, many individuals with Down syndrome were institutionalized, few of the associated medical problems were treated, and most people died in infancy or early adulthood. With the rise of the eugenics movement, 33 of the then 48 U.S. states and several countries began programs of forced sterilization of individuals with Down syndrome and comparable degrees of disability. Action T4 in Nazi Germany made a public policy of a program of systematic involuntary euthanization.'' '''Down's Syndrome History'''David Wright (25 August 2011). Downs: The history of a disability: The history of a disability. Oxford University Press. pp. 104–108. ISBN 978-0-19-956793-5. [https://books.google.com/books?id=0FMKNv_ALRYC&pg=PA200 Archived from the original] on 28 May 2013. Retrieved 25 August 2020.

''The Great Depression of the early 1930s was a worldwide social and economic shock. Few countries were affected as severely as Canada. Millions of Canadians were left unemployed, hungry, and often homeless. The decade became known as the Dirty Thirties due to a crippling drought in the Prairies, as well as Canada’s dependence on raw material and farm exports. Widespread losses of jobs and savings transformed the country. The Depression triggered the birth of social welfare and the rise of populist political movements. It also led the government to take a more activist role in the economy.'' '''Great Depression 1930''' Struthers, James. "The Great Depression in Canada". The Canadian Encyclopedia, 16 April 2020, Historica Canada. [https://www.thecanadianencyclopedia.ca/en/article/great-depression read article] Accessed 24 August 2020.