Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The social or mental hygiene movement of the late 19th and early 20th centuries was an attempt by Progressive-era reformers to control venereal disease, regulate prostitution and vice, and disseminate sexual education through the use of scientific research methods and modern media techniques. The social hygiene movement represented a rationalized, professionalized version of the earlier social purity movement.Many reformers, such as Dr Marie Stopes, were also exponents of eugenics. Inspired by Charles Darwin's theory of natural selection, they argued for the sterilisation of certain groups, even racial groups, in society. This link between racial hygiene and social hygiene can be seen in Australia, where the Racial Hygiene Association of New South Wales is now named The Family Planning Association.