In the mid-1970s, it noted, Minnesota’s leading businesses formed the Five Percent Club—in which Minneapolis–St. Paul corporations agreed to set aside 5 percent of their pretax income for philanthropy. Believe it or not—and it is a little hard to believe, given the modern emphasis on maximizing profits and pleasing Wall Street—the club still exists. Now known as the Keystone Club, it has 214 members, and 134 of them donate at the 5 percent level …
