There may well be a limited number of ways to keep saying the same thing but I’ve not quite found that limit yet:
So, free trade in the G-7 is a great idea. And the benefits of trade go to the importers. So, therefore, it’s possible to gain all the benefits of that free trade even if we’re the only people in the G-7 doing it. If the U.S. is the only country that abolishes tariffs and barriers, then the U.S. is the place (more accurately, Americans are the people) benefiting from that free trade. Which means that it doesn’t matter what everyone else does. Unilateral free trade is something we can do without anyone else’s agreement and it also makes us richer. So, obviously, we should do it.
This has in fact already been tried. Friedrich Engels (Karl Marx’s buddy) noted that the Industrial Revolution hadn’t benefited the British working classes much. So much that the way in which wages didn’t rise very much for the first hundred years of that industrialization is called the “Engels Pause.” All the money went to the capitalists — the 1 percent, the landlords, the rich bastards. Then in 1846, Britain declared unilateral free trade. No tariffs, no barriers, on anything. Real wages started their rise, the working class — you, me, and Joe Sixpack today — were the people who made out like bandits from it. It’s also you, me, and Joe Sixpack that the economy ought to be run for.