This is a VERY simple idea and it works off of human nature's egoistic tendencies as well.
All land the land is free for everyone to use and share. Since the whole land will be free, it'll stop the need for theft of land because you won't need to steal food when you can just grow your own.
People will put up gardens or mini-farms to raise crops or animals for food. There will be basic housing (depends on the craft of the owner) and people will be able to set up their own communities for friends and families.
Since this society won't be advanced enough to really use any industrial or electronic technology it'll end many diseases caused by pollution thus leaving no real reason for medical advances. (There may still be diseases though that kill people. Always was and always will be.)
Farmers will pretty much include everyone who's able to work the land to make food for the rest. As hard as it is for some to believe in today's society, entertainment doesn't have to be electronic and constant. People can find entertainment in more simpler ways (such as fests, parties, swimming in lakes, building things out of wood for creative fun... etc.)
Possible Disadvantages: Some diseases, less protection against infections, less average traveling distance, shorter life spans, no technological entertainment
Possible Advantages: No war, no poverty, no exploitation, no diseases caused by impure air, higher immunity to diseases, lower crime rates, no car accidents, stronger communities, liberated lives (because working for 40 years for some company takes a big chunk out of someone's life anyways), no genocide