Murray Gell-Mann was an American theoretical physicist who played a preeminent role in the development of the theory of elementary particles. Gell-Mann introduced the concept of quarks as the fundamental building blocks of the strongly interacting particles, and the renormalization group as a foundational element of quantum field theory and statistical mechanics. He received the 1969 Nobel Prize in Physics for his contributions and discoveries concerning the classification of elementary particles and their interactions. The Nobel Prize in Physics 1969, announced October 30, 1969. Murray Gell-Mann, “for his contributions and discoveries concerning the classification of elementary particles and their interactions”. Murray Gell-Mann: born 1929, New York, NY, USA. Wiki link Data: the Nobel Foundation (CC0).