Deindividuation is a proposed (but hotly contested) psychological phenomenon in which uninhibited behavior becomes easier and more acceptable in violent crowds and mobs.
Deindividuation Term Timeline in So You’ve Been Publicly Shamed
The timeline below shows where the term Deindividuation appears in So You’ve Been Publicly Shamed. The colored dots and icons indicate which themes are associated with that appearance.
Chapter 5: Man Descends Several Rungs in the Ladder of Civilization
...in 1971 under the supervision of psychologist Philip Zimbardo. Zimbardo seized on crowd theory (or deindividuation, a proposed phenomenon in which uninhibited behavior becomes more common in an excitable crowd setting)... (full context)