Physics and the excellences of the life it brings

Scientific internationalism received a boost with the foundation of the International Atomic Energy Authority (IAEA) in Vienna. The author, representing Pakistan, among many other countries, co-sponsored a resolution requesting the establishment of an international theoretical centre, which received wide support from the world physics community. It was finally started in Trieste in 1964. The author reviews five major theoretical developments of the period 1950-1964. He describes his own work of renormalizing meson theories in Cambridge in 1950, and the problem of overlapping infinity divergences while in correspondence with Freeman Dyson, using subtraction in momentum space, and his later work on renormalizing spin-zero electrodynamics. (UK)