Because George Washington was a favorite
Answer would be: 21'st Centary. With Phones modern technology.
On April 28, 1967, boxing champion Muhammad Ali refuses to be inducted into the U.S. Army and is immediately stripped of his heavyweight title. Ali, a Muslim, cited religious reasons for his decision to forgo military service (he didnt wanna go)
A-a belief in the strength of the economy
although all of these are very vague answers this one makes the most sense because it crashed because everyone thought they had enough money and bought too much stuff they didn't need.