Why do we need a government? Imagine what your school would be like if no one was in charge. Each class would make its own rules. Who gets to use the gym if two classes want to use it at the same time? Who would clean the classrooms? Who decides if you learn about Mars or play kickball? Sounds confusing, right?
This is why schools have people who are in charge, such as the principal, administrators, teachers, and staff. Our nation has people who are in charge and they make up the government.