The great powers are always searching for opportunities to gain power at the expense of rivals, and to dominate the system.
你无法独自建立伟大的事业，找到合适的团队。
积极心理学不是一种奢侈品；它是美好生活的必需品。
对付一个不自由的世界唯一的方法就是变得如此绝对自由，以至于你的存在本身就是一种反叛。
写作是与生活荒谬抗争的一种方式。
The beauty of instrumental variables is that they allow us to see the world in a new light.
The impact of unions on wages and employment is often misunderstood.