The document summarizes how the Great Depression spread globally in the early 1930s. As unemployment rose in the US due to stock market crashes and bank failures, American consumers and businesses had less money to buy goods. This hurt companies' sales. Meanwhile, American banks and businesses started demanding repayment of loans from European countries like Germany, worsening their economic crises. The globalization of trade and finance then caused the worldwide depression, as poor nations also suffered from reduced lending and investment from Europe and America.