Have you noticed how people use their hands to emphasize a point when they are speaking? The gesture theory about the origin of language 
states that man first started using gestures to communicate. These gestures began to be accompanied by sound that eventually developed into a language.We do know that American Indians used an elaborate system of gestures to communicate with each other. However, most people believe that speech and gestures developed together. There is really no proof that gestures came before speech, so the gesture theory is not accepted by many.
