You know, off the top of my head, with the possible exception of WW1, I can't think of any war that wasn't started over money, land, or resources.
WW1 was really pretty senseless in the way it was allowed to begin. Europeon alliances just got outta hand, and one mistake lead into another.
7mm
World War One started over coal and Iron ore. The background politics was just the excuses for the real reasons.