The story of Ray Kroc, a salesman who turned two brothers’ innovative fast food eatery, McDonald’s, into one of the biggest restaurant businesses in the world with a combination of ambition, persistence, and ruthlessness.The story of Ray Kroc, a salesman who turned two brothers’ innovative fast food eatery, McDonald’s, into one of the biggest restaurant businesses in the world with a combination of ambition, persistence, and ruthlessness.The story of Ray Kroc, a salesman who turned two brothers’ innovative fast food eatery, McDonald’s, into one of the biggest restaurant businesses in the world with a combination of ambition, persistence, and ruthlessness.