An example of a social contract is -

Explanation:

Social contract theory says that people live together in society in accordance with an agreement that establishes moral and political rules of behavior. ... The U.S. Constitution is often cited as an explicit example of part of America's social contract. It sets out what the government can and cannot do.

Treat others as you want to be treated, or raise your hand to answer a question.

Explanation:

A social contract is an agreement among people or society that doesn't really need to be written down.

to inform the reader that the text will take a second look at the grimms’ original tales