There is no single "inventor" of the tourism definition, as it has evolved through several key economists and organizations. One of the earliest formal definitions was provided by the Austrian economist Hermann von Schullard in 1910. In 1941, Hunziker and Krapf (the "fathers" of tourism science) defined it as the phenomena and relationships arising from the travel and stay of non-residents. Later, in 1976, the Tourism Society of England refined it as the temporary, short-term movement of people to destinations outside their usual home and work. However, the modern, globally recognized standard was established by the United Nations World Tourism Organization (UNWTO). They define tourism as the activities of persons traveling to and staying in places outside their usual environment for not more than one consecutive year for leisure, business, and other purposes. This definition is used by governments and international bodies to track global travel statistics and economic impact accurately.