International flows of people, defined as all instances of movement of people in space that go across the set boundaries of their more or less permanent domicile, comprises international migration, refugee diasporas, small cross-border flows, and international tourism. The changes that have been taking place in international tourism for the last decades are so dynamic that, beyond doubt, this dynamically developing sector of the economy and component of international relations will soon be subject to further changes, without losing its growth rate. The development dynamics will probably also be influenced to a significant extent by the changes within the sphere of tourism. Even now we are witnessing a shift from domination of supply in tourism to domination of demand. Tourists themselves increasingly shape the demand for new tourist attractions and the ways to explore and use them. The concept of tourism as short-term trips for pleasure or recreation has developed in the internal flows of people to allow special treatment of temporary changes of residence that do not involve pursuing specific economic or professional goals. Development of international tourism is facilitated by civilizational megatrends. As shown by statistical data, in the 21st century the number of tourists crossing borders is increasing, but so do concerns about the safety of international trips due to terrorist threats and the perception of these threats. The role of international tourism in the everyday lives of societies is increasing, as is its significance for the state economies. With this, international tourism is becoming an increasingly important component of international flows of people. The question remains, however, whether this trend will prevail in the coming decades of the 21st century.