People mention environmental costs. There are also geopolitical costs. I write this from Guatemala, where 70 years ago, a budding 10-year-old democracy was destroyed so that Americans could continue to get cheap bananas. And the country never really recovered.

Of course, from technology and "globalization", I think the abundance of American supermarkets would still have occurred, but this has been optimized at the expense of human rights and wages of people throughout the world.