Organized in 1990 by Robert N. Butler, M.D., Professor of Geriatrics at Mount Sinai School of Medicine, The International Longevity Center-USA (ILC-USA) is a not-for-profit, nonpartisan research, policy and education organization whose mission is to help societies address the issues of population aging and longevity in positive and constructive ways and to highlight older people's productivity and contributions to their families and to society as a whole. The ILC-USA is an independent affiliate of Mount Sinai School of Medicine and is incorporated as a tax-exempt 501(c)(3) entity. The center has been located at 60 East 86th Street in New York City since 1999.