After the destruction of the Second Temple in 70 CE removed the priestly and sacrificial center of Jewish religious life, leadership migrated to scholarly courts in places like Yavneh and, later, Babylonia. Over the next half millennium, the Mishnah and the two Talmuds (Jerusalem and Babylonian) compiled and codified rabbinic law, ethics, and lore in a way that made the corpus portable: it could be carried, copied, taught anywhere a community settled.
Local governance ran through the kahal (community council), responsible for taxation, charity, dispute resolution, and representation before non-Jewish authorities. The kahal coordinated with rabbinical courts (beit din) for civil and religious matters. When attacked, expelled, or pressured to convert, communities did not have to reinvent these structures: they had a standard kit of institutions to plug into a new place.
Education was treated as obligation rather than luxury. Compulsory literacy among Jewish men predated state-run schooling in most of Europe by centuries — driven by the religious requirement to read scripture and study commentary. The beit midrash (study house) was a shared institutional form across regions.
Financial life was shaped by exclusion. Restricted from owning land and from many guild-controlled trades in much of Europe, Jewish communities concentrated in long-distance commerce and credit, fields where literacy, written contracts, and trans-local kin networks were more valuable than territorial title. The institutional advantages were a response to legal disadvantage, not an essential trait.
The decentralization itself was a survival feature. No single library, court, or population center could be lost in a way that erased the tradition. The Inquisition could destroy the community of Spain in 1492 without ending the corpus — Sephardic learning regrouped in Amsterdam, Salonika, the Ottoman lands. The Holocaust murdered six million people; the institutional forms survived because they had never been concentrated in one place.
The modern story diverges, with the founding of Israel in 1948 returning state sovereignty to one part of the diaspora. The pre-modern thousand-year experiment in stateless institutional continuity is what is most relevant to a study of survival intelligence.