The Cato Institute approves a model of society in which there are simply individuals in pursuit of their own self-interest (in particular their economic self-interest).
So do I. There is nothing in libertarianism that precludes people from living a more traditional lifestyle, if they so choose. In fact many libertarians do just that. It seems you have a beef with those who want to make choices differently than you.
They must band together, as a collective force. They must go on strike?
In a certain sense all human endeavors are collective. For example, a start-up company. You seek out others who share your commitment to a particular goal, then work together to accomplish that goal. So what? I work with all kinds of people in my daily life and in pursuit of my life goals. As long no coercion is involved, this is perfectly compatible with libertarianism.
One's body being the most private and precious of all property.
Of course. This is a tautology, especially with regards to bio-medicine and life extension.
I will say it again. There is no reason why like-minded individuals cannot live a "traditional" life in a libertarian society. It appears that your problem with libertarianism is not that it prevents you from living your own life, but that you can't force your choices onto others.
Kurt is suggesting that you can make society in general run along libertarian lines but within this society individuals could voluntarily associate to purse a traditional lifestyle together.
I want to point out a few of the problems with Kurt's suggestion. First, it does not allow for the preservation of real, historic nations of people. If the Poles, for instance, were to adopt Kurt's advice, they would not be able to say "we want to preserve our existing Polish identity at the state level, for instance, through immigration policy." You could not assert, at the public level, one thing over another as that would be "coercion" against individual preference. The best you could do would be for individual Poles to try to keep their tradition going by gathering together somewhere in Poland as part of a voluntary association.
In the meantime, you would have an influx of people into Poland not sharing the Polish identity or tradition and, most likely, being willing to use their resources and influence to make sure that the native tradition did not prosper. Would the little pockets, the little remnants, of Polish communities survive? Even if a few did, the effect of libertarianism would not be neutral - it would have forever impacted on the real existence of the Poles as a nation of people.
It's the same when it comes to family. A traditional society requires a stable form of family life. Libertarians, though, believe that family is whatever people choose it to be. Furthermore, libertarians see the family as a purely voluntarily association that people can choose to join or leave at any time and for any reason.
And so a traditionalist community would be radically countercultural within a libertarian society. It would require a massive undertaking by individuals without large-scale resources, to set up their own towns, schools, universities and mass media, where a traditionalist understanding of family could prosper in opposition to the libertarian one. In a sense, traditionalists would be creating their own society from scratch. It is a daunting prospect, that involves escaping libertarian norms, rather than one easily accomplished within a libertarian system.
And here's another issue. Libertarianism is not value neutral. Libertarianism rests upon a particular understanding of man and society that has evolved over time from a mishmash of intellectual influences. Kurt himself acknowledges that he agrees with "a model of society in which there are simply individuals in pursuit of their own self-interest (in particular their economic self-interest)".
So it is not possible for Kurt to claim that, in pushing for a libertarian model of society, he is not imposing his own world view on others. Libertarians are, in fact, imposing a very specific concept of man, his purposes, his relationship to others and the sources of meaning, value and human dignity. From these assumptions then flow the libertarian concept of how society should be organised politically.
Furthermore, once you accept the libertarian/classical liberal world view, then a particular kind of morality emerges, one that is inevitably held to seriously by the "thinkers" within such a society. For instance, if what matters is an untrammelled pursuit of individual self-interest by all, then it becomes critical that I do not in my own choices hinder or limit the choices of others. So the moral thing then becomes "non-interference" which leads to a moral system centred on attributes such as openness to the other, respect for diversity, non-discrimination, and tolerance. Particular loyalties, especially those based on inherited attributes such as race, sex, ethnicity - even culture - are thought of negatively as limitations, perhaps even "bigotry".
So a traditionalist community is once again going to be radically countercultural within a libertarian society. It is going to be countercultural at a deeper philosophical level, and, more immediately, in terms of the moral values of that society. The traditionalist community is going to be put in the position of having to resist the moral norms of the larger society, no easy task given the way that people generally conform to the leading ideas of the society they inhabit.
Finally, there is the issue of truth claims. If you set out to create a society with a multitude of religions and cultures, then it becomes difficult to hold to the deeper truth claims of any of them. To be part of one tends to become something like a "personal preference" or a "sentimental attachment" without a wider significance. The centre moves elsewhere, most likely to some sort of commercialised lifestyle and culture. In practice there is a hollowing out of the culture.
I remember the comment of one American classical liberal who forcefully insisted on cultures and religions being inconsequential:
Cultures and religions are either about weddings and music and fancy clothes or they're about to get their asses kicked...If all religions and cultures are equal then none is superior, and that is how we keep them in line.
Kurt, I hope you can understand from all this why I don't find the prospect of trying to maintain a traditionalist community within a libertarian system appealing. It is certainly not the ideal for traditionalists to aspire to. Nor does it make sense for traditionalists to accept the organisation of society according to a value system so much at odds with our own.