Pneumonia is absolutely something that would have been detected on a wellness check, as the lungs would have sounded crackly when listened to. So, likely you were sold an entirely healthy puppy. If the issue arose due to a congenital defect, and you can PROVE it (meaning a necropsy was done that revealed the defect), then by all means press for the compensation allowed by your health guarantee for a life threatening or fatal congenital defect.
However, it certainly could have arisen through no fault of the breeder, while under your care, and with absolutely no contributing defect. If that's the case, you have no grounds for compensation from the breeder, it's not at all their fault.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.