Spontaneous order, also named self-organization in the hard sciences, is the spontaneous emergence of order out of seeming chaos. It is a process in social networks including economics, though the term "self-organization" is more often used for physical changes and biological processes, while "spontaneous order" is typically used to describe the emergence of various kinds of social orders from a combination of self-interested individuals who are not intentionally trying to create order through planning. The evolution of life on Earth, language, crystal structure, the Internet and a free market economy have all been proposed as examples of systems which evolved through spontaneous order.