This book dealt with various reasons for great Economic Depression 1929 and its consequences, and the Economic Impact of COVID 19 on Various Sectors in India such as tourism, MSME, stock market, real estate, agriculture sector, diversification of investment, inter-state migration, unorganised sector and labour laws, significance of air-conditioned godowns and food processing industries, poverty and trickledown effect of reservation and the mint set of the economic system in India.