It spread through via international airline travel very quickly.
The answer is McCarthyism.
During this period, the U.S. was determine to prevent the spread of
communism in its territories.
Surveillance and warrantless arrest of suspects were rampant. Many lost their careers after being branded a
communist while others were put in jail.
Many criticized this actions as unconstitutional.
The Quraan was verbally sent down in parts to The Blessed Prophet Muhammad (peace be upon him) by the archangel Gabriel (Jibril) at the age of 40. The Quraan was finally compiled after the Prophets' death at 63 during the ruling of Umar son of Khattab (RA).
Please do NOT quote me on this. I will look further into it if needed.
D. Cuneiform
The Sumerians developed cuneiform, which was a system of writing in which writing was inscribed on clay tablets with a stylus. This is one of the earliest known systems of writing.