There is a long book by David Graeber called Debt: The First 5000 years. It is an anthropological/historical work that I think would be highly useful to someone who is trying to imagine worlds without "money" as we know it.
I have recently made enough money to not work (at least not for the present!) and, accordingly, the difference between my hobbies and my profession is quite blurry. I would say that this takes a higher priority to me than do other, more mundane, activities (such as the aforementioned making of money). That said, the fact that I have only recently done this work in a relatively public forum opens me to the (accurate) criticism of lacking either the sharpness or urgency of a true professional. In short, I have been lazy. In fact, it is only the increasingly dire-ness of our collective straits (and the clear incapability of any of our leaders to rescue our bacon on their own) that has motivated me to be more serious about it.