Answer: The correct answer is: In ancient Babylon, fingerprints were pressed on clay tablets to mark contracts. The oldest documents known as such where fingerprints are shown date from China in the third century B.C. Sir William Herschel began collecting fingerprints in 1856 and noted that they were not altered with age. In 1888 Sir Francis Galton together with Sir Edmund Richard Henry developed the fingerprint classification system and this system is still used in the United States. Identification by fingerprints is very reliable.
That would be the Munich agreement
Social scientists study people. For example: Anthropologists study human evolution and their culture. Physcholgists study people and the working of their mind!
A contract is an agreement, usually written out on a legal document, in which it states terms and agreements, as well as rewards that would be given at the end when the terms are met.
For example, a contract for assassination may be posted out in the black market. An assassin would then agree to take on the requirement of the contract. If it is met, the payment would be given to the assassin. If not, then the contract becomes void. This makes contracts important because the terms and everything is written down, and can be looked on for future references.
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According to Al Bakri, Kumbi Saleh (Ghana) consisted of two towns. In one town lived the arabs, it held twelve mosquets and numerous wells of sweet water. In this town lived learned men, as well as jurists and religious men. Six miles away laid the city where the king lived (Al Ghaba), in a palace surrounded by a defensive wall.
Only the king and his heir could wear sewn clothes and other accessories, signs of wealth, while the common people that followed his religion could only dress with simplicity, shaving their beards and hair. The king's way of living would exude power, wealth and magnificence, and his followers could only show humility by kneeling and sprinting their heads with dust. While the arabs would greet him by clapping.
As I understand it, the customs in arab lands were much more equal, there were not big social differences between its inhabitants. In the other part of the city, this was not the case, there would be big social differences between the king and its followers, that the author doesn't name bi its etniciti, nationality or religion. They were just the followers of the king.