It looks like you are doing the read() calls inside of main(), instead of inside the thread function. Since the read() calls will block, they need to be done in separate threads, otherwise (as you have seen) your main thread will block waiting for a single client and won't be able to service the other clients in parallel.
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.