Alfred North Whitehead was a British mathematician and philosopher known for his pioneering work in mathematical logic and the philosophy of science. He collaborated with Bertrand Russell on the seminal Principia Mathematica, which sought to ground mathematics on logic. Whitehead's later philosophical works, particularly 'Process and Reality', contributed significantly to the development of process philosophy. His interdisciplinary approach to metaphysics and epistemology has left a lasting impact on philosophy and science.