Are We All One?

Are we all one?  Is the soul an individual or merely a collection?  Are we both a collection and an individual? 

I've always thought we are both an individual spirit that is part of the collective.  The collective is the fountain of energy where all the spiritual energy that is, has been or ever will be is gathered.  With each trip we make to our planet as embodied spirits do we add another layer of dimension?  I think perhaps we do.  It helps us to explain when we are familiar with things or places or tasks we have not done, seen or felt in this lifetime. 

Have you ever visited a place for the first time and known that you have been there before?  I had a friend who visited the pyramids for the first time.  It was his biggest desire to make it to see them.  He had seen them being built in his dreams and felt he had participated in the building in another lifetime.  When he got there, he KNEW he had been there before and began to flash back to a time during their construction.  It wasn't just familiar.  He remembered intimate details about them. 

If you believe in reincarnation and I do, then it seems feasible and likely that there is a memory imprint which can be accessed. 

Any thoughts anyone?