What are the social, political and economic causes and effects of the great depression?

In addition, high tariffs and war debts were political causes of the great depression. America had lent money to the united kingdom and other European nations in the world war i reparations, as the United States experienced this economic downturn, many other nations were affected as America insisted on repayment .

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They mowt likely lived in caves or maybe rock houses,i know they are similar but its all i know