WHEN I LEFT INDIA, I had my heart set on becoming a theoretical physicist. I was nineteen years old and had just graduated from Baroda University. It was customary to stay on to get a master’s degree in India before going abroad for a PhD, but I was eager to go to America as soon as I could. To me, it was not only the land of opportunity but also of rational heroes like Richard Feynman, whose famous Lectures on Physics had been part of my undergraduate curriculum. Besides, my parents were already there, as my father was doing a short sabbatical at the University of Illinois in Urbana. Since
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