https://psmag.com/news/the-underlying-psychology-of-political-radicalism/
New Research Finds Political Radicals Harbor a Cognitive Style That Transcends Political Views
Dec 18, 2018 - Radicals are less able to recognize when they're wrong, even in a task having nothing to do with politics.
new researchpolitical radicals
https://www.wikidata.org/wiki/Q617261
Political Party of Radicals - Wikidata
Dutch political party
political party of radicalswikidata