… absolute monarchs will often make wars when their nations are to get nothing by it, but for purposes and objects merely personal, such as, a thirst for military glory, revenge for personal affronts; ambitions or private compacts to aggrandize or support their particular families, or partisans. These … often lead him to engage in wars not sanctioned by justice, or the voice and interests of his people.
John Jay in Federalist No. 4
Jnana's Red Barn 