Men are not naturally enemies, for the simple reason that men living in their original state of independence do not have sufficiently constant relationships among themselves to bring about either a state of peace or a state of war.
Gist of Idea
Natural mankind is too fragmented for states of peace, or of war and enmity
Jean-Jacques Rousseau (The Social Contract (tr Cress) , I.4)
He sees people in a state of nature as more or less solitary, and certainly in groups any more organised than a small family. One might then be in a state of permanent feud, rather than war, but without settlements people can move away.
Rousseau,Jean-Jacques: 'The Basic Political Writings', ed/tr. Cress,Donald A. [Hackett 1987], p.145