Because if you have a industrial and agricultural surplus then ultimately the demand for goods would drop as well as the price of that surplus
First impressions are said to be lasting impressions, and indeed, it is remarkable how soon the New World "that was never before known to anyone" was viewed as a land of wealth, promise, and opportunity
Economic depression make many democracies became weak and they became threatened for the communism and dictators.
The 1929 Crisis was a consequence of the great expansion of credit through money supply (issuance of money and bonds) carried out by the Federal Reserve System (a type of US Central Bank) since the early years of the 1920s. from 1929, this expansion had to be stopped by the Government, since the adjustment of accounts needed to be done. The Government then stopped expanding the money supply and began to operate a loan restriction policy. Fearing the currency's devaluation, many people and companies withdrew their reserves from banks, initiating a recessionary process.
<span>To enforce and administer federal laws
Hope this helps! ;)</span>