Should I use a single header to include all static library headers?

In general, when linking the final executable, only the symbols and functions that are actually used by the program will be incorporated. You pay only for what you use. At least that's how the GCC toolchain appears to work for me.

I can't speak for all toolchains.

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.