The agricultural revolution enabled people to grow crops and have farms which meant that they could grow their own food and not be nomads anymore. The crops would be based on the environment which meant that not all people could grow the same crops. Those who were herding animals or were hunters still kept moving because you can't grow an animal like you can a plant so they had to keep moving to regions with new animals.
True the dust bowl did not help due to it causing farmers not to be Able to grow food or crops which sent us further into the Great Depression
John F. Kennedy died on November 22, 1963 in Dallas, Texas. Kennedy was taking a tour of the streets of Dallas, in an open environment, surrounded by thousands of people, which made it a simple target for the murderer, who was able to plan the attack beforehand which made it a tragic impact.
The dynasty that succeeded the Umayyads was the Abbasid dynasty/Caliphate, and it was established by As-Saffah, who was the first caliph of the Abbasid caliphate.
The pyramids are in C. Egypt.