1925 The International Institute of Intellectual Cooperation—which aims to exchange intellectual ideas and improve quality of life—is set up in Paris, France.
1945 The United Nations Conference establishes the constitution of UNESCO.
1983 First International Biosphere Reserve Congress takes place in Minsk, Belarus.
1995 Statutory framework of the World Network of Biosphere Reserves is agreed.
2015 The UN launches its 17 Sustainable Goals initiative.
2017 The US withdraws 17 sites from the UNESCO World Network of Biosphere Reserves, but 23 new sites are added elsewhere.
During the second half ...