The MacArthur Foundation is a private philanthropic organization based in the United States, established in 1970. It aims to support creative individuals and effective institutions through grants and initiatives that address critical social challenges. The foundation focuses on various areas, including education, public health, and climate change. One of its most notable programs is the MacArthur Fellowship, often referred to as the "genius grant," which recognizes individuals who have shown exceptional creativity and potential in their fields. The foundation's work is guided by the belief that investing in innovative ideas can lead to significant societal improvements.