“One of the things that excited me so much about quantum chromodynamics after the work of Gross and Wilczek and Politzer was that it seemed to provide a rational explanation for what had always been mysterious to me — the fact that there were symmetries, like parity conservation, charge conjugation invariance, and strangeness conservation, that were very good symmetries of the strong and electromagnetic interactions — as far as we knew exact — and yet were not respected by the weak interactions. Why should nature have … symmetries that are symmetries of part of nature but not other parts of nature?”

— Steven Weinberg

"Reminiscences of the Standard Model" - Special Colloquium by Steven Weinberg https://www.youtube.com/watch?v=mX2R8-nJhLQ, 17 October 2017, YouTube video at 1:02:17 of 1:39:24

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Steven Weinberg 46

American theoretical physicist 1933

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