Prince Karim Agha Khan is the current Aga Khan and the 49th Imam of Nizari Ismailism, a denomination of Shia Islam. He is the direct descendant of the Prophet Muhammad and a hereditary spiritual leader to millions of Ismaili Muslims around the world. The Aga Khan has worked to improve the quality of life for people in developing countries through his Aga Khan Development Network, a group of agencies focused on social, cultural, and economic development. He has also been involved in promoting dialogue between different faiths and cultures.