Zelmanov was awarded the Fields Medal at the International Congress of Mathematicians in Zürich. His prizewinning work was not directly related to his main field of research, nonassociative algebras. However, he made spectacular advances in group theory by solving the century-old restricted Burnside problem, using the theory of Lie algebras. Zelmanov’s broad interests were critically important in this work, as a proof of his major result probably could not have been carried out by a traditional group theorist or Lie theorist. Zelmanov also made important contributions to the study of Jordan algebras, which are of interest in the study of quantum mechanics.