migration was a huge theme of the depprision. people from all over were moving west to california. the dust bowl had forced many of them out of there homes because they couuld not make a living off the land anymore. this was one of the largest migrations in the history of the us. we see this theme today not so mch in america but more peole comming to america. people imigrating toj the us for several reasons such as more freedom, aand more job oportunties.