"Star Wars" was an all-in gamble for George Lucas in 1977. Even with the blockbuster success of 1973's "American Graffiti," the filmmaker was taking a massive risk by creating a sprawling, richly imagined sci-fi/fantasy saga from scratch. Just about every studio in Hollywood passed on the project. No one understood it. Alan Ladd, then the head of 20th Century Fox, didn't get it either, but he believed in Lucas enough to give him a budget in the neighborhood of $10 million. This translates to...