The story
From de- + individuation, first described in 1952 by Leon Festinger and colleagues.
Etymology from Wiktionary, CC BY-SA 4.0.
deindividuation
Today it means: The situation where antinormative behaviour is released in groups in which individuals are not seen or paid attention to as individuals; immersion in a group to the point at which the individual ceases to be seen as such. Full definition →