The spread of liberal democracy and the integration of the world economy have created a situation in which the major powers are no longer willing to risk war with one another.

The universe is not only stranger than we imagine, it is stranger than we can imagine.

发明是不够的。尼古拉·特斯拉发现电力，但是他却纠结于是否将它空开给人们使用。你不得不将这两件事整合：发明和创新，再加上公司愿意将其商业化给人们使用。