文明被描述为对一系列挑战的回应结果，而其中最大的挑战始终是气候。

You don’t build a business, you build people, and then people build the business.

统治者的首要职责是保护社会免受其他独立社会的暴力和侵略，只有通过军事力量才能实现这一职责。

We live in a world where people are judged by their worst actions, not their best.