Is it best to submit your hubs' urls to search engines like google or not?

I am waiting to see the answer to your question as it is one I have wondered as well.

I'm not sure if you should submit your URLs to search engines, but I've been receiving traffic from Bing even though I've never even been to that site.

No need to explicitly submit to the search engines, as they eventually "crawl" and find out your stuff. When and how differs for each search engine . Google has this "deep crawl" and "fresh crawl" methods ...(google for details).

Though there is some time lag eventually they will crawl and include it in their Index - so there is no need to submit it to search engines explicitly.

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.