and how long did they last? just a blip on the map. i don't know what the solution, but if you have an anarchistic society, you're probably not going to be as well-organized as government run states.. which means they will come for your ass and use you and your resources up.
Oh, they were pretty well organized alright. In fact, in many ways much better than the government they had. Take a look at the 6 part BBC documentary "The Spanish Civil War". You have to understand, this wasn't chaos and "survival of the fittest" we're talking about, it really was a well organized society... it just so happened that it had no central government, and still worked.
are you talking about the movement that lasted for 3 years? the movement that ultimately gave way to francisco franco? i'm not really well-versed with the history of anarchy in societies, but it seems like they usually don't last very long.