The last version of Boost says " Boost. Chrono can be configured as a header-only library defining BOOST_CHRONO_HEADER_ONLY. However Boost.
Chrono depends on the non header-only library Boost. System, so that you will need to link with boost_system.
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.