Our inflated egos
Land, resources, and power. The same struggle occurs all throughout nature. The only things that are different about our species is that we're intelligent (and ignorant) enough to mask that struggle behind religious and political ideology.
people wanting what some-one else has and wanting everybody to be like them.
i used to believe it was misunderstandings but more recently it seems to me like its just greed
money and power
Money, Stupidity, Resources, Money, Defense, Expanding, Money, Jobs, Factory productions, Money....take your pick
Geo-political conflict. Someone always wants what someone else has and tries to take it by force.
Testosterone being more than brainpower... like a very large pub fight
stupidity and money
Dis-agreements that could be worked out if people were more understanding and compassionate.
JOHNNY BRAVO... who loves ya momma :).. sorry it never gets old