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Tony Brenton took a sabbatical at Harvard University to write The Greening of Machiavelli – The History of International Environmental Politics after setting up and leading (1990–92) the Foreign Office unit that negotiated for the 1992 Rio "Earth Summit", and in particular the first global agreement on climate change. In 1989–90, he headed a UN Department in the Foreign Office in London. Through 1994–98 he worked as a Counsellor in British Embassy in Moscow, responsible for the British aid programme to Russia, analysis of the Russian economy and UK policy towards Russia in the major international economic fields. In 1998 he was nominated to the position of Director on Global Issues in FCO. Within the sphere of his responsibilities was the policy towards the UN, human rights, the environment and international economy and development.
https://en.wikipedia.org/wiki/Tony_Brenton