What happens to ground truth when so many roads lead back to the same source? Monocultures cause problems. The Irish potato famine that killed hundreds of thousands of people happened in large part because farmers came to depend on a single vulnerable strain. If bananas vanish from supermarket shelves, you can blame it on the breeding of a single variation—easier to grow and harvest but with no ability to survive disease. The SolarWinds software breach wouldn’t have caused so much damage had it not been so widely and deeply embedded in, according to some sources, almost all Fortune 500 companies, the US Treasury Department, and even Homeland Security.