Some nations make war with each other because they want to expand their economic power . in order to feed their overpopulated countries , they fight to gain more land , to gain more of the economic market , et cetera . it all has to do with the body 有些国家作战只是为了扩张自己的经济领域，为了喂饱过多的人口，而跟别的国家打仗，以获取更多的土地更大的经济市场等等，这些战争都因这个肉体而起。
Of course , if the earth were to become overpopulated , we can imagine sending families in space vessels to colonize the nearest stars . but it ' s their great - great - great - grandchildren who would finally reach those stars . and they wouldn ' t even know where to stop 当然，如果地球上的人口过多的话，我们可以想象，把一些家庭送进太空船中，让他们去开发最近的恒星。但是，最终到达这些恒星的是他们的万代子孙了，而且，他们可能甚至不知该在哪里落足。
