 It is joined by the LSE IDEAS think tank, which in a global survey conducted by the University of Pennsylvania in 2015 was jointly ranked as world's second-best university think tank for the third year running alongside the LSE Public Policy Group, after Harvard University's Belfer Center for Science and International Affairs.In February 2015, Angelina Jolie and William Hague launched the UK's first academic Centre on Women, Peace and Security, based at the School.The Centre aims to contribute to global women's rights issues, including the prosecution of war rape and women's engagement in politics, through academic research, a post-graduate teaching program, public engagement, and collaboration with international organisations.