Here, we discussed:
How many of these realms are fictional? Geographically, Britain is an island. Biologically, it is inhabited by homo sapiens. But what makes it "Britain"? Its name, language, institutions, laws, cultures, customs, traditions, ideas, beliefs, values and politics are creations of the human mind. Money is notoriously a convenient fiction. It is a truism that a bank does not physically contain all the money that it lends or invests. My name is not part of me but only the memory of having been addressed with a particular sound from the earliest age. My marriage contract, property ownership and right to a state pension do not exist in nature. Apparently it is difficult to determine who owns some fields around Lancaster because the relevant documents are hard to find. The Duke of Westminster and his valet are two human beings. Both need to be rescued from a burning building, not one before the other. Some people are prepared to kill for their sense of national identity...
In SM Stirling's Emberverse, the loss of technology enables some surviving groups to impose entirely different sets of ideas on society. One of these sets of ideas is derived from a work of fiction, and even includes an "invented" language, but were all social ideologies not already works of fiction? Poul Anderson shows us Manuel Argos imposing ideas from the Roman Empire on the social chaos that he has inherited from the Solar Commonwealth. Is Argos very different from Stirling's Tolkienists?