John D. Rockefeller Jr. was an American businessman and philanthropist, born on January 29, 1874. He was the only son of John D. Rockefeller, the founder of the Standard Oil Company. Following in his father's footsteps, he played a significant role in the family business and was instrumental in the development of various philanthropic initiatives. Rockefeller Jr. is best known for his contributions to the arts and education, including the establishment of the Rockefeller Foundation in 1913. He also helped fund the construction of notable landmarks, such as the Rockefeller Center in New York City. His efforts significantly impacted American society and culture.