The John D. and Catherine T. MacArthur Foundation is a private philanthropic organization based in Chicago. Founded in 1970, it aims to support creative people and effective institutions through grants and initiatives. The foundation focuses on various areas, including education, public health, and environmental conservation. One of its notable programs is the MacArthur Fellowship, often referred to as the "genius grant," which recognizes individuals who have shown exceptional creativity in their work. The foundation's mission is to promote a more just, verdant, and peaceful world through its funding and support of innovative ideas and solutions.