The Emperor of Japan is the monarch and the head of the Imperial Family of Japan. Under the Constitution of Japan, he is defined as the symbol of the Japanese state and the unity of the Japanese people, and his position is derived from "the will of the people with whom resides sovereign power".
Distinctive rock sequences on south america terminate at the atlantic ocean but reappear on the continent of Africa. This is evidence towards the theory of Plate tectonics and the existence of Pangaea.
A social contract often relates to the legitimacy of the authority someone has over the individual. The relation between legal and natural rights also is a topic of social contract.