All things he never was. However, the movie has certainly produced a boon in the Scotland Forever market. One thing movies cannot do is influence a whole society for a long period of time. One thing the movie did not do is influence a nation to conduct a major land war against a nation in the South West Asia. Perhaps the movie was part of a larger pattern of politics and desire, but certainly not the catalyst that forced the issue.
Movies can illustrate a certain period of history.
Its story of the Joad family is truly a brilliant expose into the travails of the American people during the Great Depression. Both movies managed to capture the mood, the truth, about a period of time. Movies can also grasp the obvious and let us see things we would normally ignore. THE DOG is a good example of this. Truth can imitate art.