John D. Rockefeller Jr. was an American philanthropist, financier and conservationist. The only son of John D, Rockefeller, the founder of the Standard Oil, he is believed to have donated over $537 million over his lifetime to various causes, notably in educational establishments, leaving around $240 million for his own family. Modest, unaffected, and unostentatious, he served as a director of Standard Oil for around thirteen years before resigning from his post to concentrate on his philanthropy, helping to establish institutions like Rockefeller University, General Education Board,  Rockefeller Foundation etc. However, the goodwill he thus created was shortly destroyed by what later became known as Ludlow Massacre and he was falsely accused of orchestrating the event. Nevertheless, he continued with his work, building Rockefeller Center during the depression, later making sure that the United Nations remains in the city by donating land. He also purchased and donated land for creating national parks across USA and took up many reconstruction works at home and abroad.