This document provides an overview of different types of laws and the ethical foundations of laws. It discusses how laws have evolved from individuals taking revenge to developing a court system. The four main sources of law are constitutions, statutes, case law, and administrative law. Criminal law addresses wrongs against society while civil law involves private disputes between individuals or organizations. Procedural law establishes how legal rights must be exercised while substantive law defines legal duties and rights. Business law covers rules that apply to business transactions. Ethics involve determining what is right or wrong based on consequences or established rules and authorities.