"Claudio Bunster founded the Centro de Estudios Cientificos (CECS), a world class institute for frontier science research in Chile. His mentor, John A. Wheeler often used Teddy Roosevelt's advice, "Do what you can, where you are, with what you have." "I followed his advice," said Bunster. "At latitude 40[degree]S there is a science institute where one can find the footprints of Wheeler in every corner."" "As a true pioneer, Bunster was ahead of his time, opening roads, pushing the frontiers, under extreme conditions, in unexplored environments. Throughout his career, black holes, monopoles, the Antarctic vastness and the entire universe, have been the objects of his fascination: extreme, simple objects where beauty is best captured and displayed." "On 10 and 11 January 2008, the meeting Quantum Mechanics of Fundamental Systems: The Quest for Beauty and Simplicity - Claudio's Fest took place in Valdivia to celebrate Claudio Bunster's 60th birthday. This volume collects the contributions that were discussed at this meeting by many of Bunster's colleagues and longtime collaborators. Articles by L. Brink, S. Carlip, F. Englert, S. Hawking, M. Henneaux, C.W. Misner and L. Susskind, among others, highlight the broad impact of Bunster, providing unique insightful views on many topics addressed by him in his scientific career, ranging from black holes and symmetries in gravity and supergravity, to cosmology." "The meeting was co-organized by the CECS and the International Solvay Institutes."--Jacket.