Islam spread extensively along the east coast of Africa by foreign traders.
Becahse during a debate on the Constitution many of the states had insisted that the Bill of Rights be added and then became one of the first task of the new Congress they also moved quickly because the bill of rights aims to protect people against abuses by the federal government and they wanted Americans to know that
As it was the Cold War which meant that neither side was willing to attack the other as both sides had atomic weapons aimed at the other. This would lead to a nuclear war