Causes of the Great Depression

Historians have argues over the cause of the Great Depression, since the outset. Some say it was "lack of business confidence", others say it was caused by underconsumption and over production. I believe the answer can not be found in one cause. A multitude of factors came into effect, to cause the Great Depression. Over production led to the saturation of the market, and then led to underconsumption. This is compiled with the over speculating and the eventual crash of the market. With no one buying goods in a consumer centered society the economy started to fail.