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The benefits of social behaviors as a norm is that they keep a community united and they also create an understanding of what is accepting. They provide a comfort of living things because they know what to expect.

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Shaking hands also is a way to communicate respect for another human. Many humans use this social behavior to evaluate the type of impression that a person gives off.

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The history of the handshake dates back to 5th century DC in Greece. It was a symbol of peace, showing that neither person was carrying a weapon. Some people believe that handshaking started in mid-evil Europe. Knights would shake the hand of others in an attempt to shake lose any hidden weapons.