My opinion -to make it short- is that people often misunderstand what John Norman wrote; and the entire style grew out of proportions due to -mainly- the fact that the novels were first written in a time when emancipation (of women) was seen as something novel and -hence- was rejected by many polarized sides of society, specially in the US and western Europe.

True, slaves in the Gorean society are not allowed to leave their Master, the most they can do is ask him to give the slave away or sell him off but I have personally seen Gor Masters give "liberty" (ack, this word sounds so corny after the Gettysburg declaration) to their slaves.

On the other hand, notice that 99% of the slaves that are induced into the Gor lifestyle are women. This oughta tell you something. Gorean lifestyle does not streamline with other cultural waves of this time, such as gay, lesbian, hell! not even with the "smoking-is-not-cool-anymore" movement...

My educated guess is they will survive as a group, and they will -in a couple of centuries- be seen the way we look at Amish people today in New York and Pennsylvannia, albeit, with a pinch of kink and lots of sadistic flavor.

If you feel like venturing into the Gor society -which I do not encourage, but that is not saying I despise it, I simply base myself on a live-and-let-live philosophy, and you don't want to get too close to the fire or you want to stay safe at all times, you can always check out the Gor community in a popular roleplaying game called "Second Life". They have several communities there, I should say virtual communities; and they are pretty welcoming if you dont write "curious", "stereotyped ass" or "rebel without a cause" on your forehead.

Enjoy...