A businessperson is an individual who has founded, owns, or holds shares in (including as an angel investor) a private-sector company. A businessperson undertakes activities (commercial or industrial) to generate cash flow, sales, and revenue by using a combination of human, financial, intellectual, and physical capital to fuel economic development and growth. Since a "businessman" can mean anyone in industry or commerce, businesspeople have existed as long as industry and commerce have existed. "Commerce" can simply mean "trade", and trade has existed through all of recorded history. The first businesspeople in human history were traders or merchants. Merchants emerged as a social class in medieval Italy (compare, for example, the Vaishya, the traditional merchant caste in Indian society). Between 1300 and 1500, modern accounting, the bill of exchange, and limited liability were invented, and thus the world saw "the first true bankers", who are certainly businesspeople. Around the same time, Europe saw the "emergence of rich merchants." This "rise of the merchant class" came as Europe "needed a middleman" for the first time, and these "burghers" or "bourgeois" were the people who played this role. Europe became the dominant global commercial power in the 16th century, and as Europeans developed new tools for business, new types of "business people" began to use those tools. In this period, Europe developed and used paper money, cheques, and joint-stock companies (and their shares of stock). Developments in actuarial science and underwriting led to insurance. Together, these new tools were used by a new kind of businessperson, the capitalist. These people owned or financed businesses as investors, but they were not merchants of goods. These capitalists were a major force in the Industrial Revolution. The Oxford English Dictionary reports the earliest known use of the word "business-men" in 1798, and of "business-man" in 1803. By 1860, the spelling "businessmen" had emerged.