As I understand, Dirac equation was first interpreted as a wave equation following the ideas of non relativistic quantum mechanics, but this lead to different problems.
The equation was then reinterpreted as a field equation and it is now a crucial part of quantum field theory.
My question is: could you provide me a reference (paper, book) that explains this evolution, including the different historical steps, etc. ?
I have a good knowledge of QM and I studying field theories, but I would like to have a clearer view on this historical evolution.