Theory is the highest form of knowledge because not all experts are prominent in creating and producing new theories. This is the reason to highly respect people who have successfully made theories. Theory generally becomes the main goal of science. The most typical thing of theorists is that they do not merely describe social life or the history of social development stand-alone. They help us to view human society with different perspective. Therefore, we will understand about the information of social life through their masterpieces and farther we will comprehend about the essence of human social connections.