Well, I wasn't writing a book. You are absolutely correct, I was aiming for the idea of Socialism rather than the practice. I really was aiming at today's world and the little bit of history was for context, not study.
I'm currently writing a similar piece on Capitalism. Depending on how that goes I may go more in depth on specific forms and types.
Thank you for a good, questioning comment. Always appreciated even though I ducked the answer :)