How does the legal system govern society and business transactions?

"Our legal system affects everyone who lives and does business in the United States. The smooth functioning of society depends on the law, which protects the rights of people and businesses. The purpose of law is to keep the system stable while allowing orderly change. The law defines which actions are allowed or banned and regulates some practices. It also helps settle disputes. The legal system both shapes and is shaped by political, economic, and social systems. As Judge Learned Hand wrote in The Spirit of Liberty, “Without [the law] we cannot live; only with it can we insure the future which by right is ours.” In any society, laws are the rules of conduct created and enforced by a controlling authority, usually the government. They develop over time in response to the changing needs of people, property, and business. The legal system of the United States is thus the result of a long and continuing process. In each generation, new social problems occur, and new laws are created to solve them. For instance, in the late 1800s corporations in certain industries, such as steel and oil, merged and became dominant. The Sherman Antitrust Act was passed in 1890 to control these powerful firms. Eighty years later, in 1970, Congress passed the National Environmental Policy Act. This law dealt with pollution problems, which no one had thought about in 1890. Today new areas of law are developing to deal with the internet and the recent financial scandals."