The reason ways and the culture of america has changed so much is because of citizens in the past arguing and expressing their freedoms to see if they can get some things changed by the government that is wrong or possibly change their lives for the better. Knowing about the past can also fuel the American spirit and help persuade people to want to fight for their country increasing in military power and adding on to the defense of America. All of these can help all American and possibly even future Americans make their life what they want or at least the chance to change what they want. It can also help foreigners understand why we shoot fireworks on the Fourth of July, or why we celebrate Martin Luther King Jr. Day. All of these are effects of knowing about america and our government, to help not only make it better but also us as a people in