Prime purpose of this lecture is to present on causes of the Great Depression. Here briefly describe some causes, like: Unequal Distribution of Wealth; High Tariffs and War Debts; Overproduction in Industry and Agriculture; 1928 Presidential Election; Farm crisis; Federal Reserve Monetary Policy; Stock Market Crash and Financial Panic. Although the nation’s wealth grew by billions throughout the 1920s, it was not distributed evenly. The top 1% received a 75% increase in their disposable income while the other 99% saw an average 9% increase in their disposable income.