The first man who， having fenced in a piece of land， said 'This is mine，' and found people naïve enough to believe him， that man was the true founder of civil society.

如果你不冒险，你永远不会知道自己真正的潜力。

最难的事情是简单。

基础结构决定论原则认为，社会文化系统的结构受人口、技术和环境相互作用的影响最为强烈。