Imagine if you had the resources to purchase a plot of land. An island, maybe. It's a sizable piece of real estate, covering somewhere around 1,000 acres. It's located in a temperate climate, with plenty of open fields, forests, running rivers and great lakes. You contact the proper authorities and somehow manage to section off this land with a very high fence, running all around its border. You've got a chance to start your own village, town, commune, or even your own country. It would be a small country, but it would still be its own entity.
Now, imagine this place is advertised in a not so blatant way. Maybe it's word of mouth that spreads, but either way, in time you are presented with a population of around 3,000. Metalworkers, carpenters, lumberjacks, fishermen, farmers, geologists, retired politicians, whatever -- these people make up a wide variety of professions. They do not want to be paid, they only want to be a part of your project.
Now, my question to you: How would you run this establishment? Even if you did not want to lead, the people rise up at the beginning and imbue you with the title of President, or King, or Queen, or what have you. How would your ideal government function? After a short while, these people will multiply (not from newcomers, but from breeding!) Before you know it, the population of your settlement is at 10,000. Will your society have upper-class, middle-class, and lower class citizens? What will the laws consist of? How will religion be observed? Holidays?