John Muir (1838–1914)
1872 Yellowstone, in the states of Wyoming, Montana, and Idaho, is declared a national park—the first in the world.
1948 The International Union for Conservation of Nature (IUCN), a partnership of governments and civil society organizations, is founded.
1961 The World Wide Fund for Nature (WWF), initially known as the World Wildlife Fund, is formed, to protect endangered species and habitats.
1971 The Man and the Biosphere Programme (MAB) is founded by the United Nations, to promote sustainable development. It has a global network of Biosphere Reserves.
The origin of the movement to ...