State legislatures make laws in each state. State courts can review these laws. If a court decides that a law is not in conformity with the state constitution, it can declare it invalid. Administrative regulations are regulations issued by state or federal administrative agencies. Examples include the Environmental Protection Agency and the Internal Revenue Service. These rules contain the rules for the application and enforcement of a law. Federal agencies that make regulations obtain their regulatory and enforcement authority from Congress through “enabling legislation,” which grants and defines the scope of its powers.  Anarchism was practiced in society in much of the world. Anarchist mass communities ranging from Syria to the United States exist and range from hundreds to millions. Anarchism encompasses a wide range of socio-political philosophies with different tendencies and implementations. After much of the West was consolidated under Charlemagne, law was centralized to strengthen the royal court system and, consequently, jurisprudence and abolish popular law. However, after the final fragmentation of Charlemagne`s kingdom, Europe became feudal and law was generally not regulated above the county, municipality or dominion level, creating a highly decentralized legal culture that fostered the development of customary law based on localized jurisprudence. MI 11.
After sacking the Byzantine Empire, the Crusaders returned with Byzantine legal texts, including the Justinian Codex, and scholars at the University of Bologna were the first to use them to interpret their own customary laws.  Medieval European jurists began to study Roman law and use its concepts and paved the way for the partial resurrection of Roman law as modern civil law in much of the world.  However, there was great resistance, so civil law competed with customary law for much of the late Middle Ages. Socialist law is the legal system of communist states such as the former Soviet Union and the People`s Republic of China.  Academic opinion is divided as to whether this is a separate system from civil law, given the significant divergences based on Marxist-Leninist ideology, such as the subordination of the judiciary to the ruling executive party.    The most prominent economic analyst of the law is the 1991 Nobel laureate, Ronald Coase, whose first major article, The Nature of the Firm (1937), argues that the reason for the existence of firms (corporations, partnerships, etc.) is the existence of transaction costs.  Rational individuals negotiate through bilateral contracts in open markets until transaction costs mean that using firms to produce things is cheaper. His second major paper, The Problem of Social Cost (1960), argued that if we lived in a world without transaction costs, people would negotiate among themselves to create the same allocation of resources, regardless of how a court ruled in property disputes.  Coase used the example of a boring case called Sturges v Bridgman, in which a noisy confectionery manufacturer and a discreet doctor were neighbours and went to court to see who needed to move.  Coase testified that regardless of whether the judge ruled that the confectionery manufacturer had to stop using its machines or that the doctor had to live with it, they could enter into a mutually beneficial agreement on the movers, achieving the same resource allocation result. Only the presence of transaction costs can prevent this.  The law should therefore foresee what would happen and be guided by the most effective solution.
The idea is that law and regulation are not as important or effective in helping people as lawyers and government planners believe.  Coase and others like him wanted a change in approach to shifting the burden of proof of positive effects onto a government intervening in the market by analyzing the cost of action.  State laws are enacted by state legislatures and apply only within the state. While they regulate activities within a state, they must give way to federal laws in the event of a conflict. The “primacy clause” of the United States Constitution, Article VI, clause 2, provides that the Constitution and federal laws are “the supreme law of the land.”  Land laws that contradict federal law are “anticipated.” Hugo Grotius, the founder of a purely rationalist system of natural law, argued that law derives both from a social impulse – as Aristotle had suggested – and from reason.  Immanuel Kant believed that a moral imperative requires that laws “be chosen as if they were to be regarded as universal laws of nature.”  Jeremy Bentham and his pupil Austin, following David Hume, believed that this confused the problem of the “east” with what should be. Bentham and Austin argued for the positivism of law; This true law is completely separate from “morality.”  Kant was also criticized by Friedrich Nietzsche, who rejected the principle of equality and believed that law emanated from the will to power and could not be called “moral” or “immoral.”    Some civil injustices are grouped into torts in common law systems and torts in civil law systems.  To have committed an offence, one must have breached an obligation to another person or violated a pre-existing right.
A simple example could be accidentally hitting someone with a cricket ball.  Under the law of negligence, the most common form of tort, the injured person could seek compensation from the party liable for his or her damages. The principles of negligence are exemplified by Donoghue v. Stevenson.  A friend of Donoghue ordered an opaque bottle of ginger beer (for Donoghue consumption) from a café in Paisley. After consuming half of it, Donoghue poured the rest into a cup. The decomposing remains of a snail floated.