They feared being invaded and threatened by NATO because of NATO's exercise of nuclear capability.
The comparison is that Nomadic hunters moved around a lot, as the early agriculture communities could stay in one place, and just farm.
1. gulf of tonkin incident
2. truman doctrine
3.containment of communism
probably a little off but it'll lead you in the right direction.
(I was literally learning this a couple months ago and my memory is a little rusty)
The Great Pyramid of Egypt located in Giza is the largest pyramid in the world. It is also included in the list of the Seven Wonders of the World. Pyramids were builts by slaves for their pharaohs or kings. Royalties were mummified when dead and buried with their treasures. It was believed that when pharaohs die, part of their spirit remain in their bodies. Hence, pyramids were built to take care of the spirit.