A corporation is a legal entity separate from the persons that form it. In British tradition it is the term designating a body corporate, where it can be either a corporation sole (an office held by an individual natural person, which is a legal entity separate from that person) or a corporation aggregate (involving more persons). In American and, increasingly, international usage, the term denotes a body corporate formed to conduct business, and this meaning of corporation is discussed in the remaining part of this entry (the limited company in British usage).
Corporations exist as a product of corporate law, and their rules balance the interests of the shareholders that invest their capital and the employees who contribute their labor. People work together in corporations to produce value and generate income. In modern times, corporations have become an increasingly dominant part of economic life. People rely on corporations for employment, for their goods and services, for the value of the pensions, for economic growth and social development.
By the end of the nineteenth century the forces of limited liability, state and national deregulation, and vastly increasing capital markets had come together to give birth to the corporation in its modern-day form. The well-known Santa Clara County v. Southern Pacific Railroad decision began to influence policymaking. The decline of restrictions on mergers and acquisitions encouraged a wave of corporate consolidation: from 1898 to 1904, 1,800 U.S. corporations were consolidated into 157. The modern corporate era had begun.