Answer: it is considered so because of three superpowers USA, Russia and China now face off along multiple fronts with weapons that could end the world.
Control for international capital, terrorism, regional and transnational conflict are emerging problems of post cold war era.
Explanation: the United States, Russia and China have been engaging in provocative acts, intimidating rivals and they all possess weapons of mass destruction. For example, now Russia is tearing existing accords while China is occupying islands in the south China sea and the United States once bombed some part of Iran.
