 World War III was a nuclear war primarily involving wealthy and powerful developed countries whose destruction resulted in fundamental changes in the global balance of power, as long-established national boundaries and concentrations of population were broken.World War IV was a non-nuclear war (also known as the Second Vietnam War) triggered by the ensuing collapse of many developing countries.As a result of these wars the global geopolitical landscape has become heavily balkanized, with even formerly strong developed countries like the United States divided into smaller, less stable competitors.