By David Brooks, New York Times

Centuries ago, historians came up with a classic theory to explain the rise and decline of nations. The theory was that great nations start out tough-minded and energetic. Toughness and energy lead to wealth and power. Wealth and power lead to affluence and luxury. Affluence and luxury lead to decadence, corruption and decline.

“Human nature, in no form of it, could ever bear prosperity,” John Adams wrote in a letter to Thomas Jefferson, warning against the coming corruption of his country. Yet despite its amazing wealth, the United States has generally remained immune to this cycle. American living standards surpassed European living standards as early as 1740. But in the U.S., affluence did not lead to indulgence and decline.

That’s because despite the country’s notorious materialism, there has always been a countervailing stream of sound economic values. The early settlers believed in Calvinist restraint. The pioneers volunteered for brutal hardship during their treks out west. Waves of immigrant parents worked hard and practiced self-denial so their children could succeed. Government was limited and did not protect people from the consequences of their actions, thus enforcing discipline and restraint.

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