The most famous section of the Declaration of Independence is an example of social contract thinking. Read the terms of the contract below:

We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness. — That to secure these rights, Governments are instituted among Men, deriving their just powers from the consent of the governed. That whenever any Form of Government becomes destructive of these ends, it is the Right of the People to alter or to abolish it.

In just a few words, it references the state of nature, the deal between the government and the people, and the consequences of the government's abuse of its power. As you hover over those concepts, the corresponding section in the above text will be highlighted.