The activity of commerce - though driven by individuals' self-interested desires to better their own financial positions - would gradually force peace upon the peoples of the world.

商业活动——尽管由个人优化自己财产状况的自利的愿望所驱动——会逐渐将和平加诸世界。

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In a nation of strictly self-interested individuals, the honest among us would never volunteer to do these jobs, the dishonest would get all of them, and living in the United States would be like living in a Third World dictatorship.

FORBES: The Case Against The Case Against Voting