In the long run, I'm cautiously pessimistic. The problems here are now clear enough to identify as fundamental; we'll need something vastly more than ingenuity and optimism to get past them. And, worst of all, it seems very doubtful whether we'll ever know if we've got it right.
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While it's true that quantum field theory is very hard, mainly because nobody fully understands it yet, I'm afraid stressing this point too much may dissuade
@wtgowers from learning more about how people came up with the Standard Model. -
There's a lot of fun to be had by learning the history. I'd start with this: Robert P. Crease and Charles C. Mann, "The Second Creation: Makers of the Revolution in Twentieth-Century Physics".https://www.amazon.com/Second-Creation-Revolution-Twentieth-Century-Physics/dp/0813521777 …
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There are better books out there now, though. 36 or so years ago when I first started learning QFT the situation was much worse. It's like each book shows you QFT from a different angle.
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