How do links become broken and do links have to be used?

You will see links become broken if you link to folks who eventually leave HubPages. When they leave, their material goes away, and is no longer linkable. It does not happen often.It is ok to have Hubs with zero links, you can always edit your Hubs after initial publication to add in any that you feel are relevant.

Personally, I prefer to link to material generated by folks here on HubPages.

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.