The Great God Theory. This theory states that God is the one who created everything in this world. It explains that God is the root of all that is happening in the world. This theory attempts to explain the origin of man and the world are the creation myths to be found among preliterate peoples. We need to study history to know what happened in the past. History enables us to understand and explain issues from the past. It also enables us to detect patterns that might otherwise be concealed in the present. History offers a critical viewpoint for understanding and addressing current and future problems.