“That society which has the least resistance to the uninterrupted flow of ideas, diversity, concepts and competitive signals wins,” says Nandan Nilekani, C.E.O. of the Indian tech giant Infosys. “And the society that has the efficiencies to translate whatever can be done quickly — from idea to market — also wins.”

The old left thinks free trade is something that benefits only multinationals. In fact, it is now critical for small businesses and individuals, who can now act multinationally. They are the ones who create good jobs.

Last week, I was in Nebraska, where I met Doug Palmer. He and his partner, Pat Boeshart, make insulated concrete forms for buildings. The traditional way to insulate concrete with foam is to make the foam and then truck it around the country to building sites to be attached to concrete. Mr. Palmer’s company, Lite-Form, found a Korean machine that, when combined with devices added by his firm, can make the foam and concrete together on site, saving big dollars in trucking. Today, Mr. Palmer’s South Sioux City company imports these machines from Korea, attaches its devices and exports them to Kuwait. His company has an Arabic brochure that tells Kuwaitis how to use the device. The brochure was produced by a local ad agency owned by the Winnebago Indian tribe of Nebraska. The agency was started by the tribe’s economic development corporation. Midwest Indians publishing Arabic brochures for Nebraskans importing from Koreans for customers in Kuwait ...

“Protectionism scares me,” said Mr. Palmer, who has 28 employees. “If we put up a moat and keep doing what we’re doing, thinking we’re the smartest in the world, we’re going to die. We have to have that flexibility to barter and trade.”