Ray Kroc visited the McDonald brothers' successful restaurant in 1954 and saw the effectiveness of their limited menu and quick service model. He later bought the exclusive rights to the McDonald's name and franchise in 1955. By 1958, McDonald's had sold its 100 millionth hamburger. McDonald's grew to over 35,000 locations globally using a business model focused on quality, service, cleanliness, value, and a three-legged stool of owners, suppliers, and employees. Going forward, McDonald's will need to address risks like changing consumer tastes and increasing health consciousness.