It is difficult to avoid war, especially if a country has abundant natural resources and the level of national defense is weak, other countries which have great power will definitely attack a country which has great natural resources. As is happening in various countries today and in history.
Apart from what you said, war will always exist as long as there are countries that are dissatisfied with the progress of other countries in the world. Because when war doesn't happen, of course it could be created so that weapons factories can operate in order to sell ammunition to those who need it even though they themselves know that the ending will not be good. But this is clearly not easy to avoid because there is a feeling of dissatisfaction and there is something that a country wants to control which in the end can lead to endless war.