It’s really very simple. If someone is making a ton of money off of you, they are less inclined to blow you up. Profits are a great pacifier, and no one wants to destroy the people who have been buttering your bread.

During the 1960s, the U.S. defense establishment went into a panic when China exploded its first atomic bomb. Some 58 years later, the exponential growth of trade between our two countries has caused the risk of a mutual nuclear war to fall to near zero.

And what country in the world today would love to bomb the U.S. off the face of the earth, if it had the remotest ability to do so? North Korea, which conducts no trade to speak of with the U.S.

There is another big reason why protectionism fails. It is counterproductive in its impact on the American economy. And not in a small way. There are more than 45 million Americans living in abject poverty, stretching every dollar they have to make ends meet, saving nothing. The apparel industry employs 135,000 Americans. Can one really justify tariffs that increase the price of clothing for the 45 million in order to save a few of the 135,000 low-wage jobs?

A three-year, 15% tariff enabled domestic producers to raise their prices, thereby increasing the costs of many American manufacturers. By one estimate, each U.S. job “saved” costs $550,000 as the average bolt-nut-screw worker was earning $23,000 annually.

Ronald Reagan imposed “voluntary restraints” on Japanese automobile exports, thereby creating 44,100 U.S. jobs. But the cost to consumers was a staggering $8.5 billion in higher auto prices, or $193,000 per job created, six times the average annual pay of a U.S. autoworker. And there were big job losses in sectors of the economy into which the $8.5 billion of consumer spending could not be spent, such as clothing.

In 2012, Barack Obama boasted that “over a thousand Americans are working today because we stopped a surge in Chinese tires.” But this cost about $900,000 per job, paid by American purchasers of vehicles and tires. The non-partisan