I'm actually not. I think many approaches have their pros and cons. Anarchy sounds a lot better as a path to a classless system, I don't disagree with Trotsky's permanent revolution, though I am heavily against his 4th International (and to a big degree the 3rd one as well) and I think that socialism is the hardest way to make it work, but if it does, is probably the best since it prepares the populace to think in a different way.

But good for you for figuring me out when I haven't done that myself in over 20 years I'm in politics.

As for that dick contest about communists before Marx and their books, because it is a dick contest at this point, I never claimer Marx was the first to talk about communism, or use that word. Even the manifesto was commisioned by a pre existing party namely the Communist League. A party that existed before Marx and Engels came in contact with them.

But Marx was in fact the first to bring those ideas together, from philosophy to economy to politics etc and describe a full featured system that covered it all (for his time, times changing and things adapt), which is why is the one most well known and remembered with his name attached to it. Take it further, back to ancient Greek philosophers why don't you?

The original poster asked an ELI5 of communism. While what you say is not wrong, it's far from ELI5. Even for someone like me who spent years reading on all that, there were a couple of things you mentioned I didn't know about. At the end of it all there's a reason that if you look at the history of communism most will refer to Pre-Marx and after. And a simple answer to a simple question of "what be?" has to start somewhere. I chose Marx since it's probably the best entry point for someone who has no idea.