What is the history of measurement?

well you see the history is that a orange eating monkey sat down and make a mark that looked like the king and they copied it and said it was a yard.. the foot came to be a totally different way it was that the cavemen were tired of not being able to build anything with out the other cavemen making fun of him because it did not fit ever so he finally went home and cried and then measured everything off of his fore arm that was 12" which is now the foot...