The second big triumph is the successful conclusion, after 15 years, of the Millennium Development Goals, which have underpinned the largest, longest, and most effective global poverty-reduction effort ever undertaken. Two UN Secretaries-General have overseen the MDGs: Kofi Annan, who introduced them in 2000, and Ban Ki-moon, who, since succeeding Annan at the start of 2007, has led vigorously and effectively to achieve them.