Because of the interests gained; some investors (or elite) are involved in illicit activities related to wars (such as selling weapons/war related products or using the natural resources of the foreign country illegally). By controlling the political decisions, they can linger the war to increase their profits. However, the people are the voters so ending the wars depends on the people and whom they vote for. That’s why phobias and hatred were planned and promoted to divide the public opinions especially in many developed countries. The solution is to bring out the truth, to talk about it and to help the people understand what’s going on (that’s also how to end wars).