History is a subject where students learn about the events about the past. To take a clear decision in the present, we must have a clear knowledge about what happened in the past. By learning history, we learn the richness of our culture and at the same time, we get an idea about other nations and their customs too. By knowing about different nations' we can also promote harmony and learn to respect them. A clear knowledge of the past will lead to a good future. Hence history is unique among all branches of social science.