Bananas are a photogenic edge case, not a staple food. Far more representative of America's food-wealth are grains and meat -- which it produces in enormous amounts, and exports to the rest of the world. That doesn't happen by exploiting people; it happens because of technology, because of mechanized agriculture and high-yield seeds and synthetic fertilizer and many other under-appreciated pillars of the modern world. And those technologies have been spreading through the world, lifting people out of poverty in vast numbers.

I won't ask you to show appreciation for heroes like Haber and Bosch and Borlaug and all the rest, but they have my thanks.