This document discusses the history and concepts of sustainable development and responsible tourism. It traces the evolution of sustainable development from the 1972 World Commission on Environment and Development to the current Sustainable Development Goals. The Brundtland Commission in 1987 defined sustainability as "meeting present needs without compromising future generations." The document argues that responsible tourism involves using tourism to achieve sustainable development goals, rather than being used by the tourism industry. It also discusses challenges to responsibility like short-term thinking and the tragedy of the commons.