Seeing radical religion continued through an elder-and-student succession over the generations also sets it apart from the wider society. In practice, it also invokes a circle of learning, all working together.
Sometimes, as in monasteries, the circle receives support from the wider society. At other times, it is based in circles of families whose identity somehow stands apart from the wider society. Upholding those values requires passing the teachings and practices down through the families.
This has been the history of the Jewish people, for starters, the preservation of a unique vision of justice and philanthropy, a critical stance from the mainstream, the independent role of prophecy in which political and social rulers are placed under a more absolute authority, monotheism rather than polytheism.
We see it, too, to some extent in minority and ethnic communities as they attempt to maintain their unique identities and cultures.
The Amish, of course, stand out in America as they pursue this.
One of the complications is that it can lead to a relatively small gene pool when it comes to finding a spouse.
In the Church of the Brethren, the annual sessions, which alternated between the East Coast and the Midwest, were often followed by marriage announcements. In other words, it was the place to go if you were looking. The shared values heightened the chances for a successful union, we can suppose.
For Quakers, the boarding schools allowed for some wider mixing than one would find in the home village. Still, the lines could tangle in time, even with a strict ban on first-cousin marriages. I remember a conversation with one young couple who told me they were also third cousins or some such. Don’t think it was aunt and uncle, but it seemed that complicated at the time.
Maybe that’s why I wasn’t shocked by the complex, tangled family lines presented in Jeffrey Eugenides’ Middlesex or even the incest. (As others have noted, the reason the incest taboo is so universal is simply that the practice has likewise been so universal.)
In the novel, persecution leads to brutal oppression and massacre. The generations are torn apart. And then, somehow, they continue. What shocks most is the violence and hatred and related moral failures of the more “civilized” ships that fail to come to the rescue of innocent victims. But that returns us to thoughts of the wider society, doesn’t it.
Jnana's Red Barn 