Moderation theory - Wikipedia
https://en.wikipedia.org/wiki/Moderation_theoryModeration theory is a set of interrelated hypotheses that explain the process through which political groups eschew radical platforms in favour of more moderate policies and prefer electoral, compromising and non-confrontational strategies over non-electoral, exclusive, and confrontational strategies. Moderation can take place at both ideological and behavioural levels that mutually reinforce each other.