1/ The Einstein Energy-Momentum Relation can be straightforwardly turned into the `Klein-Gordon Equation.` 
Why’s that important?
The KG-Equation describes spinless particles of any charge! †pic.twitter.com/mboQngOfat
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6/ † It’s important to note though: for common spinless particles, e.g. the pion, the KG-Equation doesn’t tell the whole story because quarks & gluons also experience the Strong Force. Oh well!
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) where ℏ = c = 1, and replace `E` and `p` for their quantum operators... 
The Klein-Gordon Equation! 
I’m not a fan of the myth that we tell the kids that we “know” that confined particles are a composite state of quarks/gluons when in reality quarks and gluons are just I’ll defined when the coupling is strong
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That’s a very good point. There’s a lot of space for more to happen inside. I’ll keep that in mind by adding in some nuance
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Maybe a thread on Feynman diagrams would be a strong point to emphasize second order interactions
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It’s a subtle aspect of field theory but still important (to second order lol)
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