The three important reasons for studying history are

. you can not know the truth about historicsl events and how the world came to be.

. you can not know who you are if you do not know where you come from.

. you can hope to learn something that can be put into future use.

Firstly so we don't make the same mistakes that we made in the past. We use history to understand how the world worked in the past and how it works now. Lastly our world has bore witness to countless important events that have changed the world. We have to dive into the depths of the history books to know and understand why certain events happened. If we didn't have history no one would learn from the mistakes of the past and would more than likely repeat them.