In the first seven months of 2020, as the Covid-19 pandemic brought America to its knees, sales at survivalist supplier Augason Farms surged. The company couldn’t make its packages of long-storage comfort foods – powdered eggs and nut butters, freeze-dried stroganoffs, casseroles and lasagnes – fast enough. To meet the demand, founder Mark Augason simplified his production, knocking his 60 products down to the core best sellers and cutting off dozens of distributors so he could funnel his sales largely through Walmart Inc. and Amazon.com Inc. “It was like my Super Bowl – it was finally here,” Augason told me.?...