Question: When did the concept of sustainable development come into existence?

Disambiguated questions and answers:
context: While the modern concept of sustainable development is derived mostly from the 1987 Brundtland Report, it is also rooted in earlier ideas about sustainable forest management and twentieth-century environmental concerns. As the concept developed, it has shifted its focus more towards the economic development, social development and environmental protection for future generations. It has been suggested that "the term 'sustainability' should be viewed as humanity's target goal of human-ecosystem equilibrium, while 'sustainable development' refers to the holistic approach and temporal processes that lead us to the end point of sustainability". Modern economies are endeavoring to reconcile ambitious economic development and obligations of preserving natural resources and ecosystems, as the two are usually seen as of conflicting nature. Instead of holding climate change commitments and other sustainability measures as a remedy to economic development, turning and leveraging them into market opportunities will do greater good. The economic development brought by such organized principles and practices in an economy is called Managed Sustainable Development (MSD).
question: When is it widely accepted that the modern concept of sustainable development came into existence?
short_answers: 1987

October 1987
wikipage: Sustainable development

context: In 1980 the International Union for the Conservation of Nature published a world conservation strategy that included one of the first references to sustainable development as a global priority and introduced the term "sustainable development". Two years later, the United Nations World Charter for Nature raised five principles of conservation by which human conduct affecting nature is to be guided and judged. In 1987 the United Nations World Commission on Environment and Development released the report "Our Common Future", commonly called the Brundtland Report. The report included what is now one of the most widely recognised definitions of sustainable development.
question: When did the concept of sustainable development come into existence marked by the IUCN publishing its World Conservation Strategy referencing sustainable development as a priority?
short_answers: 1980
wikipage: Sustainable development

context: Following the Club of Rome report, an MIT research group prepared ten days of hearings on "Growth and Its Implication for the Future" (Roundtable Press, 1973) for the US Congress, the first hearings ever held on sustainable development. William Flynn Martin, David Dodson Gray, and Elizabeth Gray prepared the hearings under the Chairmanship of Congressman John Dingell.
question: When did the concept of sustainable development come into existence marked by an MIT group presenting the first ever hearings on sustainable development?
short_answers: 1973
wikipage: Sustainable development

Long answers:
knowledge: content: One of the first uses of the term sustainable in the contemporary sense was by the Club of Rome in 1972 in its classic report on the Limits to Growth, written by a group of scientists led by Dennis and Donella Meadows of the Massachusetts Institute of Technology.
wikipage: Sustainable development
long_answer: The modern concept of sustainable development is derived mostly from the 1987 Brundtland Report, but it is also rooted in earlier ideas about sustainable forest management and twentieth-century environmental concerns. One of the first uses of the term "sustainable" in the contemporary sense was in a 1972 report on the Limits to Growth, written by a group of MIT-led scientists, which led to MIT researchers presenting before the US Congress in 1973 in the first hearings ever held on sustainable development. In 1980, the International Union for the Conservation of Nature published a world conservation strategy that included one of the first references to sustainable development as a global priority.