We hear about law everyday whether we realize it or not. It's in our Government, in our work, and even in our houses. One type of law is Criminal law, which is also known as Penal law. This is "The body of statutory and common law that deals with crime and the legal punishment of criminal offenses."

Inside of criminal law there is four major theories of criminal justice:
- Punishment
- Deterrence
- Incapacitation
- Rehabilitation

This form of law is essential in many cases because it can distinguis between crimes from civil wrongs. Criminal law has been around for ages, and is seeing as the fundamental system of regulating the behavior of individuals and groups relatively to what is defined as the social norms. This differs between civil crimes, where the difference is between two individuals and their individual rights and obligations under the law which is ruling the entire society.

An example of a civil law case is a dispute between two individuals over a contract that they made to for example sell an automobile. In that case one individual feels that their individual rights for a fair automobile sale have been breached by the other party. Where as in a criminal case, you would have for example a murderer, who is infringing on the right of safety that we all have. Given those two examples I'm sure you can appreciate how important Criminal law is, and the important role that it plays in everyone of our societies.