Here's a quote from Dirk Schlimm, clarifying his perspective on 'Powerful People' -

“Depending on where you are, the managing director of your local subsidiary, the head of your finance department, the influential member of your board, the critical donor in your charity, or the owner of your small business may be just as powerful in your setting as a corporate tycoon in someone else’s.”

One implication for family businesses -

The leader of your family business may be just as powerful in your setting as a corporate tycoon in someone else’s.