I would like to add Digg, Reddit, Stumble Upon, etc. buttons to my hubs. Is there a way?

As was stated most of the buttons are at the bottom of your hub, under the share button, however you will have to sign up for each one, before you can submit your work to them. After you sign up you will be able to just submit each subsequent hub to the individual sites.

I suppose these buttons are already there at the botton of every page. The GREEN button says "Share 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.