4. Traffic laws (right of way, behavior at stop signs and traffic lights, etc.).
None of the above are perfect; all of the above have been used abusively at times; all of the above are needed to some degree for the smooth functioning of society. There are some debates in the area of traffic regulations about whether some situations would be safer with a little less regulation. There's also been some regulatory capture of contract law by lawyers, but because contract law is relatively symmetric, it's less of a problem there.
2. Laws against theft.
3. Contract law.
4. Traffic laws (right of way, behavior at stop signs and traffic lights, etc.).
None of the above are perfect; all of the above have been used abusively at times; all of the above are needed to some degree for the smooth functioning of society. There are some debates in the area of traffic regulations about whether some situations would be safer with a little less regulation. There's also been some regulatory capture of contract law by lawyers, but because contract law is relatively symmetric, it's less of a problem there.