When I was a young teen, I read a sobering statement – that most Americans would starve to death standing next to a cow in a field of ripe wheat. In other words, most people don't have the faintest idea how to obtain food from elemental sources. In the age of coronavirus, this statement is coming back to haunt me. The pandemic has caused an interruption in supply lines, and for the first time in decades, Americans may face shortages. We're not used to seeing empty shelves at the supermarket. How secure is our food supply? For 5,000-plus years of...