The Stock Market Crash of 1929 was the worst downhill turn for America. Millions of dollars were lost, thousands of investors were wiped out, and many famalies were left with nothing but each other. This website will show the cause and effects for The Great Crash and explain how America and the rest of the industrialized world spiraled downward into The Great Depression (1929-1939), the deepest and longest-lasting economic downturn in the history of the Western industrialized world up to that time.