About the Foundation "Our belief that every life has equal value is at the core of our work at the foundation. We follow 15 guiding principles, which help define our approach to our philanthropic work, and employ an outstanding leadership team to direct our strategies and grantmaking. http://www.gatesfoundation.org Main Office PO Box 23350 Seattle, WA 98102 (206) 709-3100 info@gatesfoundation.org"