Overall, what was the primary cause of the Great Recession?

Overall, the primary cause of the the great recession was demand shocks. The global recession which occur in 2008 was caused by a number of factors which worked together to bring about a downturn in the global economy. The principal cause of the great recession was the demand shock which is a sudden event that makes demand to either increase or decrease. In the case of great recession there was sudden decrease in demand for goods and services.