Life means that all people have a right to live. This means their lives cannot be taken away from them. This ideal is often applied to arguments against war, capital punishment, abortion, and assisted $uicid3.
Liberty is another word for freedom. This is a basic right that all people, no matter where they live, are entitled to. Freedom is a basic tenet of democracy. It can mean that people should be free from slavery, or it can mean that people are free to express themselves, either by voting or simply by sharing ideas.
The pursuit of happiness means that people should be able to live their lives the way they see fit. It also means that people live under a government that protects their rights and, in doing so, protects their rights to live and be happy. This ideal has always been important to Americans, many of whom believe that, with enough hard work, anyone can thrive and be happy. As a people, Americans believe a purpose of government is to make sure they have the liberty to do this.
Explanation: EDM sample answer (had to change the wording for $uicid3 so I could post make sure to change it when copying)