On October 29 1929, millions of dollars were rubbed out in an event that became known as the Wall Street Crash. It led to the Depression in America which crippled the country from 1930 - 1936. People lost their life savings when firms and banks went bust, and 12 - 15 million men and women - one third of America's population - were unemployed. There was then no dole to fall back on, so food was short and the unemployed in cities couldn't pay their rent. Some ended up in settlements called 'Hoovervilles' (after the US president of the time, Herbert C Hoover), in shanties made from old packing cases and corrugated iron. Added to the man-made financial problems were natural ones. A series of droughts in southern mid-western states like Kansas, Oklahoma and Texas led to failed harvests and dried-up land. Farmers were forced to move off their land: they couldn't repay the bank-loans which had helped buy the farms and had to sell what they owned to pay their debts. Many economic migrants headed west to 'Golden' California, thinking there would be land going spare, but the Californians turned many back, fearing they would be over-run. The refuges had nowhere to go back to, so they set up home in huge camps in the California valleys - living in shacks of cardboard and old metal - and sought work as casual farmhands. Against this background, ranch hands like George and Lennie were lucky to have work. Ranch hands were grateful for at least a bunk-house to live in and to have food provided, even though the pay was low.