What explanation did J.M Keynes provide about the cause of the Great Depression?

J.M. Keynes attributed the Great Depression primarily to a collapse in aggregate demand, which he believed was exacerbated by a lack of consumer and business confidence. He argued that this decline in demand led to reduced production, rising unemployment, and falling incomes, creating a vicious cycle. Keynes also emphasized the role of inadequate monetary policy and the failure of the banking system to provide necessary liquidity. His solution advocated for government intervention to stimulate demand through fiscal policies, such as increased public spending.