During wwii, for the most part, everyone was united. we were all fighting for one cause. after wwii, america has sealed its fate as a global presence. we took on a leadership role of sorts in the playing field. then, the cold war happened (to sum it up, america and russia were not very happy with each other). when the cold war came about, things like the space race showed up too (first to go to space, first to land on the moon, etc). there were so many goals that each nation was working towards to make itself better, to make itself known, and to make sure they were a force to reckon with. in order to do that, you had to have people that were willing to do that. more people wanted their country to become a superpower, or launch people into space, or have the best weapons. people wanted to be proud of their country. hopefully that helps you :D
After the Pax Romana, came a period in which the Roman Empire nearly collapsed under the combined pressures of invasion, civil war, plague, and economic depression.
This slogan; small family, happy family, has encouraged the Indian population programs which had them limit families to one child - A. This was similarly to the one-child policy of China but was much less successful.
