Middle Ages: Actor (war like action) and person in charge of large scale production projects
17th Century: Person bearing risks of profit (loss) in a fixed price contract with the government
1725 Richard Cantillon: Person bearing risks is different from one supplying capital, a risk-taker observing the merchants, farmers, craftsmen, and other sole proprietors buy at a certain price and sell at an uncertain price, therefore operating at a risk
1797 Beaudeau: Person bearing risks, planning, supervising, organizing and owning
1803 Jean Baptiste Say: Entrepreneurship as the shifting of economic resources out of an area of lower and into higher productivity and greater yield; separated profits of entrepreneur from profits of capital
1876 Francis Walker: Distinguished between those who supplied funds and received interest and those who received profit from managerial capabilities
1934 Joseph Schumpeter: Entrepreneur is an innovator and develops untried technology
1961 David McClelland: Entrepreneur is an energetic, moderate risk taker
1964 Peter Ducker: Entrepreneur maximizes opportunities; one who starts his own, new and small business
1975 Albert Shapero: Entrepreneur takes initiative, organizes some social-economic mechanisms, and accepts risks of failure
1980 Karl Vesper: Entrepreneur seen differently by economics, psychologists, businesspersons, and politicians
1983 Gifford Pinchot: Intrapreneur is an entrepreneur within an already established organization
1985 Robert Hisrich: Entrepreneurship is the process of creating something different with value by devoting the necessary time and effort, assuming the accompanying financial, psychological, and social risks, and receiving the resulting rewards of monetary and personal satisfaction
20th Century: The notion of innovation and newness attributed to entrepreneurs is now the heart and essence of entrepreneurship. The innovation and newness can come in the form of anything from new product to a new distribution system for simplifying a new organizational structure