Bellum omnium contra omnes
Bellum omnium contra omnes, a Latin phrase meaning "the war of all against all", is the description that Thomas Hobbes gives to human existence in the state-of-nature thought experiment that he conducts in De Cive (1642) and Leviathan (1651). The common modern English usage is a war of "each against all" where war is rare and terms such as "competition" or "struggle" are more common.[3]
In his Notes on the State of Virginia (1785), Thomas Jefferson uses the phrase bellum omnium in omnia ("war of all things against all things", assuming omnium is intended to be neuter like omnia) as he laments that the constitution of that state was twice at risk of being sacrificed to the nomination of a dictator after the manner of the Roman Republic.[18]
The phrase was sometimes used by Karl Marx and Friedrich Engels:
It was also used by Friedrich Nietzsche in On Truth and Lies in a Nonmoral Sense (1873):