The change was made by Abraham Lincoln because he saw the way slaves were treated by the south and which created a further reason for the union in the war
A common law system is the system of jurisprudence that is based on the doctrine of judicial precedent, principal under which the lower courts must follow the decisions of the higher courts, rather than on statutory laws.
A warming climate can cause seawater to expand and ice over land to melt, both of which can cause a rise in sea level.
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During WW2, Japan had a one-party totalitarian military dictatorship under a semi-constitutional monarchy.
It allowed for steel to be produced much more cheaply and efficiently, This made steel more available so enough is produced to build skyscrapers.