So that in the nature of man,
we find three principal causes of quarrel:

First, Competition;
Secondly, Dissidence;
Thirdly, Glory.

The first, maketh men invade for Gain;
the second, for Safety;
and the third, for Reputation.

The first use Violence, to make themselves Masters of other men's persons, wives, children and cattle;
the second, to defend them;
the third, for trifles, as a word, a smile, a different opinion, and any other sign of undervalue, either direct in their Persons, or by reflexion in their Kindred, their Friends, their Nation, their Profession, or their Name.

Thomas Hobbes