Wars (1983: Doomsday)

War is a phenomenon of organized violent conflict, typified by extreme aggression, societal disruption and adaptation, and high mortality. There is some debate about other characteristics, but in general there is agreement that war involves at least two organised groups, is a premeditated activity at least on the part of one side, and at least one of the groups uses violence against the other. The objective of warfare differs in accord with a group's role in a conflict: The goals of offensive warfare are typically the submission, assimilation or destruction of another group, while the goals of defensive warfare are simply the repulsion of the offensive force and, often, survival itself. Relative to each other, combatants in warfare are called enemies. The terms military, militant, and militarism each refer to fundamental aspects of war, i.e. the organized group, the combative individual, and the supportive ethos (respectively).

As a behavioral pattern, war is found exhibited by many primate species including humans, and also found in many ant species. The primary feature of this behaviour pattern is a certain state of organized conflict that is engaged in between two or more separate social entities. Such a conflict is always an attempt at altering either the psychological hierarchy or the material hierarchy of domination or equality between two or more groups. In all cases, at least one participant (group) in the conflict perceives the need to either psychologically or materially dominate the other participant.

This article provides a list of all wars or conflicts since, which was the most widespread and destructive war in human history.