Society is the term to describe human beings gathered together by social networks tand power networks. It does not refer to everything everybody thinks or does, but, only refer to those things that everybody depends upon ,for example, public services, governments, and all kinds of communities. A society must keep even the poorest and weakest members willing to help even the richest and strongest, so it is very concerned with citizenship, rights, ethics ( )and time limits. These are basic ways to achieve fairness. If they break down badly, people will think the society is unfair and start taking things from each other, refusing to help each other, or seeing those who have more as cheats. When this happens, it is time for the society to break down or fail. Theft, violence and war are things that can make a society break down. A new society may be formed out of the collapse  of an old failed one when people of different kinds reach an agreement about fairness and are willing to live together in harmony again. To adapt to the society, people should make sure that their behavior can be supported by the society, that is to say, there must be some social rules on which citizens base what they do. However, some people take risks that the society will support them when they do whatever they intend to. For instance, they may refuse to obey the law, and count on their fellow society members to free them in a court of appeal, which harms the society. Therefore we need a social contract which sets out rules for the society. One kind of the social contract is a constitution  -which allows a jury or court to decide what is right or wrong according to the social rules. We know from the passage that   _
Social fairness is very important for a society to survive " there must be a war to end an old society and build a new one only the poorest are willing to help the richest in a society the poor people in a society are always cheated by those wealthy ones