Why did the great depression happen and how did it impact us society

The Great Depression of 1929 devastated the U.S. economy. Half of all banks failed unemployment rose to 25 percent and homelessness increased. Housing prices plummeted 30 percent, international trade collapsed by 60 percent, and prices fell 10 percent.

i do not know if this question has options, but a main impact of the federal reserve act of 1913, which created the federal reserve bank, was the international use of the u.s. dollar, which soon became the world's leading currency - particularly during world war i, since many nations around the world asked the united states for money.