Extremists are people who take extreme views--those which are much stronger, and often more fixed than other people's views of the same situation. In escalated conflicts, extremists may advocate violent responses, while more moderate disputants will advocate less extreme measures.

Extremists are people whose views are much stronger, and often more fixed, than other people's views of the same situation. In escalated conflicts, extremists may advocate violent responses, while more moderate disputants advocate less extreme measures (Conflict Research Consortium, 1998).

The Extremists are a team of supervillains in DC Comics Justice League titles, they were introduced in Justice League Europe issue #15.