Hand shaking

A hand shake is commonly seen as a polite greeting and most of the time done on instinct. But is this really an instinct or is it an action we've seen play our so many times it's become second nature? Usually this form of greeting is the first interaction and impression of the person your greeting. Although it may not seem significant bad handshakes leave a bad impression, shaking hands with a sweaty palm, a grip too strong, or a handshake with poor eye contact can set the entire meeting downhill. Why are handshakes so complicated? How come we continue using handshakes as greetings? Why is the perfect execution of this greeting so hard accomplish? Who created this high steak greeting? 

The root of all hand shaking is believed to be found when an Assyrian King closing off an alliance with a Babylonian leader. Later it was also seen on Greek gravestones. it would depict the living shaking hands with their deceased family member "signifying either a final farewell or the eternal bond between the living and the dead." And later in Rome seen as a action of trust, it was also engraved on their coins. The trust because long ago people would hide weapons up their sleeves, and this upward-ish palm facing gesture would show they had nothing to hide. And alas the Quakers seemed to have normalized this behavior, making it a alternative to hat dipping and bowing.