You can just use a "new Mongo()" with the same connection string and it will use the same connection, but I suggest you wrap a singleton around your Mongo connection class to retrieve the same connection object. Probably something like.
Move the connection into your shop class and instead of setting it on $m use $this->m or equivalent so you always have reference to it.
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.