High Quality Content by WIKIPEDIA articles! The Rockefeller Foundation is a prominent philanthropic organization and private foundation based at 420 Fifth Avenue, New York City. The preeminent institution established by the six-generation Rockefeller family, it was founded by John D. Rockefeller ("Senior"), along with his son John D. Rockefeller, Jr. ("Junior"), and Senior's principal business and philanthropic advisor, Frederick T. Gates, in New York State in 1913. Its central historical mission is "to promote the well-being of mankind throughout the world." Although it is no longer the largest foundation by assets, the Rockefeller Foundation's pre-eminent legacy ranks it among the most impactful and influential NGOs in the world. By year-end 2008 assets were tallied at $3.1 billion from $4.6 billion in 2007, with annual grants of $137 million.