Look at your RUBYOPT: there your loading the bundler directory and requiring it. A gem install bundler should be enough (or changing your RUBYOPT). If that's a rvm fresh install open an issue in rvm.
Feel free to nuke your RUBYOPT line. For the simple test script like this, you don't need the bundler gem at all.
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.