We ended Chap. 1 by analyzing the relationship between the core and the periphery in three major revolutions and showing that the relationship between the size of the core and the periphery was unbalanced in all three events. This fact can explain the necessity of revolution. The goal of this chapter is to develop a language that allows us to formalize and categorize different kinds of history. We will do so by using the mathematical tools borrowed from the category theorem. Figure 2.1 shows how necessary it is to develop a common language between humans and machines if we want to enable dialogue between them.