经济史和经济发展的核心问题是解释政治和经济制度的演变，这些制度创造了一个诱导生产率提高的经济环境。

我一直相信，如果你投入工作，结果就会到来。

"The more you play, the more you learn about yourself and the game."

Sustainability is not just a choice, it's our responsibility to the ocean and future generations.

除非把爱国主义从人类中剔除，否则世界永远不会安宁。