Always remember that the masses are the makers of history. This will help us properly understand the role of heroes and individuals as only catalysts in the historical development of mankind. We know that history is only changed and moved forward through the collective activity of the working, struggling masses of the people. Ideas, attitudes, etc. always arise from specific concrete conditions which must be looked at and understood to properly understand the impact of the ideas, attitudes, ideologies, etc. on the concrete material world. Remember that history is a process, not a series of unconnected events.
History is also subjective.