Who is McDonald Brothers from Grinding It Out and what is their importance?

The McDonald brothers were very difficult men but were the creators of the first McDonald's restaurant in San Bernardino. They never wanted to expand their restaurant and made it difficult for Ray to expand, too. They thought that what the had was good enough, and at several points made it hard for the restaurant to legally progress. When McDonald's was already big, and Ray wanted to officially own the San Bernardino store, the brothers sold it to him for a very expensive price. Both brothers lived good lives after selling, thinking they made the better deal. If they had cooperated, they would have been much better off.