At the same time my parents, especially my father, also were a part of the secular artistic and intellectual life of Vienna.

For the summer of 1949, I got a job in the Polaroid laboratory in Cambridge, Mass., just before the Polaroid camera made its public appearance.

I offered early support to Jeffrey Leiffer, the founder of the student Pugwash movement which concerns itself with global issues having a strong scientific component and in which scientists can play a useful role.

After I had completed a public elementary school, my mother enrolled me in the Akademische Gymnasium, a fine public high school in Vienna's inner city.

After my return to Carnegie Tech in 1952, I began a major collaboration with N. Rostoker, then an assistant of an experimentalist, later a distinguished plasma theorist.

During one or two summers, as well as part-time during the school year, I worked for a small Canadian company which developed electrical instruments for military planes.

However, while the Nazi barbarians and their collaborators threatened the entire world, I could not accept his philosophy and, after several earlier attempts, was finally accepted into the Canadian Infantry Corps during the last year of World War II.

I have just joined the Board of the Population Institute because I am convinced that early stabilization of the world's population is important for the attainment of this objective.

Finally, in 1966, we showed that superconductivity occurs even with purely repulsive interactions - contrary to conventional wisdom and possibly relevant to the much later discovery of high-Tc superconductors.