The three main aggresors of war, if we were to eliminate them all would we be a war free world?

The only other thing I could think that would make us stoop to violence and bloodshed is survival but if we all worked together and co-operated then there would be no need to fight for survival.

I think futurama has the right idea we need a president for the whole world but then that brings back power and money back into the mix creating greed and jealously.

Is there ever going to be a solution?

If anyone is familiar with the author 'Matthew Reilly' in one of his books he suggest an imminent WW3 created by greedy war mongers who prosper off the riches made by war for example weapons manufacturing, vehicles bio agents etc etc anyway he goes on to say the want more money so the plan on starting a world war 3.
I quite think this is possible that somewhere behind the scenes there is more than governments.