The Henri Poincaré Prize 1997 was awarded to Rudolf Haag for his
fundamental contributions to the quantum theory of systems with
infinitely many degrees of freedom, as one of the founders of modern
Quantum Field Theory, where he discovered the central role of the
principle of locality and of the concept of local observables as roots
of all the conceptual and formal structures; and as a leader in the
operator algebraic analysis of the foundations of Quantum Statistical
Mechanics. Of all these aspects his recent book is a superb
condensation.