You are not far from truth buddy "imperialism has been the main aim and objective in the world economy today" whereby some countries with strong military force will now start to extend it power and influence over other countries or territories all because they want to to control their trade , resources and markets all because they are stronger than those countries which is not making to me, I would have love to go deep in explaining things here, but for some reason best known to me I will end it, but those countries who are executing such power and influence over other countries and territories because they are stronger than those countries know themselves.