> Why isn’t this common knowledge? Why isn’t this one of the first things that gets told when talking about renormalisation? It's because of the historical dev

> Why isn’t this common knowledge? Why isn’t this one of the first things that gets told when talking about renormalisation? It's because of the historical development where it really did start off as a nasty bag of mathematical tricks. It wasn't until much later that Wilson and co put renormalization procedures on firm footing, and by that time it had a quite bad reputation.