- 1912 – Carl Hovland, American psychologist and academic (d. 1961).
- 1962 – Jordan Peterson, Canadian psychologist, professor and cultural critic.
- 2012 – Margarete Mitscherlich-Nielsen, Danish-German psychoanalyst and author (b. 1917).
Carl Iver Hovland (12 June 1912 to 16 April 1961) was a psychologist working primarily at Yale University and for the US Army during World War II who studied attitude change and persuasion.
He first reported the sleeper effect after studying the effects of the Frank Capra’s propaganda film Why We Fight on soldiers in the Army. In later studies on this subject, Hovland collaborated with Irving Janis who would later become famous for his theory of groupthink. Hovland also developed social judgment theory of attitude change. Carl Hovland thought that the ability of someone to resist persuasion by a certain group depended on your degree of belonging to the group.
Jordan Bernt Peterson (born 12 June 1962) is a Canadian clinical psychologist, YouTube personality, author, and a professor emeritus at the University of Toronto. Peterson began to receive widespread attention as a public intellectual in the late 2010s for his views on cultural and political issues, often described as conservative.
Born and raised in Alberta, Peterson obtained bachelor’s degrees in political science and psychology from the University of Alberta and a PhD in clinical psychology from McGill University. After teaching and research at Harvard University, he returned to Canada in 1998 to permanently join the faculty of psychology at the University of Toronto. In 1999, he published his first book, Maps of Meaning: The Architecture of Belief, which became the basis for many of his subsequent lectures. The book combines psychology, mythology, religion, literature, philosophy and neuroscience to analyse systems of belief and meaning.
In 2016, Peterson released a series of YouTube videos criticising the Act to amend the Canadian Human Rights Act and the Criminal Code (Bill C-16), passed by the Parliament of Canada to introduce “gender identity and expression” as prohibited grounds for discrimination. In October 2016 specifically, while on the University of Toronto’s campus engaging in dialogue surrounding Bill C-16, a protester approached Peterson and filmed a video that was then released online, making it one of his most viral videos, subsequently propelling Peterson’s image online. He argued that the bill would make the use of certain gender pronouns “compelled speech”, and related this argument to a general critique of political correctness and identity politics. He subsequently received significant media coverage, attracting both support and criticism.
Peterson’s lectures and conversations, propagated mainly through YouTube and podcasts, soon gathered millions of views. By 2018 he had put his clinical practice and teaching duties on hold, and published his second book: 12 Rules for Life: An Antidote to Chaos. Promoted with a world tour, it became a bestseller in several countries. That same year, columnist David Brooks described Peterson as “the most influential public intellectual in the Western world.” Throughout 2019 and 2020, Peterson’s work was obstructed by health problems in the aftermath of severe benzodiazepine withdrawal syndrome. In 2021, he published his third book, Beyond Order: 12 More Rules for Life, resigned from the University of Toronto, and returned to podcasting.
Margarete Mitscherlich-Nielsen (née Nielsen; 17 July 1917 to 12 June 2012) or the “Grande Dame of German Psychoanalysis” as she was often referred to as, was a German psychoanalyst who focused mainly on the themes of feminism, female sexuality, and the national psychology of post-war Germany.