Answer: People world wide had money invested in the New York stock exchange so when that crashed economies world wide went down with it.
Explanation:
Key basic industries, such as railroads, textiles, and steel had barely made a profit. Railroads lost business to new forms of transportation (trucks, buses, and private automobiles, for instance). Coal mining was especially hard-hit, in part due to stiff competition from new forms of energy, including hydroelectric power, fuel oil, and natural gas.
<span>The murder of millions of European Jews during WWII.</span>
