The main reason:

The goal of studying history is to give you the knowledge and thinking skills to be active and engaged citizens that participate in our democratic way of life to improve our communities, nation, and world. 

There are so many other reasons as well! Here are a few of my favorite. 

• It widens your way of looking at the world by introducing you to new cultures and locations. 

• Developing respect for people all over the world.  

• You need to learn how the world works before you work to change it

• You will understand how people connect with each other and what causes conflicts between people.

• Understanding politics and past events helps you understand current events better.

• You will better understand your place in the world and that you can change the world. 

• It will help you become a better citizen in whatever country you choose to live in.

• You will gain wisdom to learn from peoples' accomplishments and mistakes. 

• You will develop critical thinking skills and the ability to investigate information to form your own opinion.

• If you are a human, it is important to learn about other humans. 

• You are where you are because of the help of other humans.

• You live in a society, so it is a good idea to learn how to survive in a society.

• You will learn it's not about you, it's about us.