The cold war was surely the latest spike of "power" of the western world. Two large power blocs that controlled or influenced vast parts of the world. However, right now a certain decline is observable. The "eastern bloc" has broken down and lost a lot of its former power. And even the "western bloc" shows signs of internal conflicts & demographic decline. Economic power is slowly shifting to China, and to a lesser extent also south America is catching up. So, why do you think that is? Is it the failure of certain ideologies (Eastern bloc)? Internal conflicts? Or maybe you just think there is a "shift" in power and not so much a decline?