John Steinbeck - born in California to a weathy family but was interested in the lives of farm labourers. He worked alongside them and used his experiances to write several novels about their lives.
Migrant Farmers - Wall Street Crash meant that no one had any money, farmers also suffered because of a series of droughts - led to dried up land and failed harvests. Farmers couldn't pay their loans back to the bank and so had to sell their land and move away. Lots of the migrant farmers headed to California hoping there would be spare land there. However they were turned away because locals feared they would be over run. With no where to go many migrants stayed in hude camps in the Californian valleys and tried to find work as casual farmhands.
Ranch Hands - (Like Lennie and George) Low pay, but they were fed. Felt lucky to have work, and were grateful for the bunkhouses where they could sleep.