war is justified or not?

I think that war is justified for some reasons.
One of them is that conutries want to be more powerfull than others, and now a days power refers to how many control you have over other countries. Some onecan think that this can sounds strange but if we saw the past we can see that humanity had made it for all times.
One important aspects is that war increases economy not only in the involve contry, it also helps others because if the country doesnt have a shoes factory they buy it in other place, and we can see war as a business that improves the winner one in many ways.
The most important point for mee to said the war is justified is for self defense because every country need to react to stgrangers attack, if you do not do this your country is going to be one of many to be conquered