Whitehead refers to Alfred North Whitehead, an English mathematician and philosopher known for his work in logic, mathematics, and metaphysics. He is best known for co-authoring the influential book Principia Mathematica with Bertrand Russell, which aimed to ground mathematics in logical foundations. Whitehead's later philosophical work emphasized process and change, leading to the development of process philosophy. In addition to his contributions to mathematics and philosophy, Whitehead served as a professor at Harvard University and influenced various fields, including education and theology. His ideas have inspired many thinkers and continue to be relevant in contemporary discussions about the nature of reality and existence.