Who is Ray Kroc from Fast Food Nation and what is their importance?

Ray Kroc was a traveling salesman of moderate success, Ray Kroc landed in southern California selling milkshake machines. He became intrigued with the efficiency of McDonald's, and saw an opportunity for national growth, if the owners would franchise the operation. The McDonald brothers were not interested for themselves, but gave Kroc the right to sell franchises for them. He did so with gusto and became a multi-millionaire in the process.