Causes of the Great Depression
Second, there are the monetarists, who believe that the Great Depression started as an ordinary recession, but that significant policy mistakes by monetary authorities (especially the Federal Reserve) caused a shrinking of the money supply which greatly exacerbated the economic situation, causing a recession to descend into the Great Depression. Related to this explanation are those who point to debt deflation causing those who borrow to owe ever more in real terms.
Causes of the Great Depression
According to this view, the root cause of the Great Depression was a global overinvestment while the level of wages and earnings from independent businesses fell short of creating enough purchasing power. It was argued that government should intervene by an increased taxation of the rich to help make income more equal. With the increased revenue the government could create public works to increase employment and 'kick start' the economy. In the USA the economic policies had been quite the opposite until 1932. The Revenue Act of 1932 and public works programmes introduced in Hoover's last year as president and taken up by Roosevelt, created some redistribution of purchasing power.