If you’re a fan of the television show Succession, or if you’re aware of the conflicts playing out publicly and perennially among some of the most visible family businesses in the world — think the Murdochs or Sumner Redstone’s family— you might assume that family businesses are more fragile than other forms of enterprise. Indeed, that’s the conventional wisdom: Many articles or speeches about family businesses today include a reference to the ‘three-generation rule,’ which s