> Want a society with 20-hour work weeks? Cool. Go build one. Nobody is stopping you, and if it's wildly successful then others will very quickly copy it. This is a very easy thing. Actually from this angle I don't even see the point of the article.
In reality, there have been many societies with 20-hour workweeks (many hunter-gatherer societies) and many of them were wildly successful, as measured by the health and self-reported happiness of their members. But someone did in fact stop them.
If you try to set up a hunter-gatherer society with 20-hour workweeks in, say, Iowa, I guarantee you that someone will be stopping you in short order. There's plenty of grass seeds to gather and a certain amount of game to hunt, but you will inevitably come into land-use conflict with the other people nearby. Even if you are one of the tiny minority of people so rich as to be able to buy up a large chunk of central Iowa as a reserve for this purpose, you're likely to be prosecuted for permitting noxious weeds on your property, sued for allowing Roundup Ready soy to cross-pollinate onto your property, quite likely arrested for marrying your daughter off at 12, and perhaps committed to a mental institution.
(And then there's the difficulty of changing the culture of a group of people. Most utopian communities fail, because inventing a culture is difficult. People start with an existing culture and judge everything according to it. We don't even know what beliefs you'd need to adopt to live successfully as a hunter-gatherer, to say nothing of the knowledge.)
Wherever you go, you have to contend with the existing norms, laws, and resource allocations. You need a certain amount of natural resources to survive. The areas most richly endowed with natural resources are also richly endowed with groups of people who value their exclusive access to those resources and are willing to fight, or request others to fight, to preserve that exclusive access.
So, you know, it only takes a few hectares of most islands in Micronesia to support a human life, and collecting the coconuts, breadfruit, papaya, and so on is really pretty easy; you don't even need 20 hours a week. As a result, there are already people living off those hectares. If you try to "go build one" there, they will fight you, and the US government will ultimately back them up.