Bound For Glory is an excellent biography of Woody Guthrie. It stars David 
Carradine, Ronny Cox and Melinda Dillon. This movie follows Woody, played by Carradine, from the Texas/Oklahoma "dust bowl" to what he thought was the promised land, California. When Woody starts his journey he is nothing more than a hobo and sign painter. At the end of this fabulous journey he becomes one of the greatest folk singers of all time. Upon arriving in California he finds that he and the thousands of migrants from the southern US are not wanted. Woody has to eat at soup kitchens and sleep in a truck bed of a migrant park. Here he develops his amazing musical skills, but instead of doing it for nothing more than financial gain, Woody writes songs to inspire the migrants to unionize and protest their slave wages and living conditions. I truly recommend this film. It is excellent.