In 2021, the Center for Responsible and Sustainable Tourism Development celebrated twenty years of work dedicated to responsible and sustainable tourism development. It was founded as one of the first organizations in Serbia dedicated to sustainable development, at a time when there was still skepticism about the very term "sustainable development". As far as tourism is concerned, we were the first such organization whose members tried to contribute to the theoretical and practical sustainability of tourism development through direct work in CenORT and through other forms of their professional activities. The time behind us has given us the right, and we are sure that the topic we are dealing with in the future will be crucial for the development of both tourism and the global community.