{
 "source": "The book's Chapter 5 case list as it stood in Solterra's Cut 25b, before it moved to the Companion in 25c; Nakatsuka et al. 2017; Minster et al. 2016; Botticini and Eckstein 2012. Moved out of src/app/dragons/page.tsx unchanged on 2026-09-26.",
 "tables": {
  "SEALED_BY_A_TEXT": [
   {
    "case": "India’s jatis",
    "text": "The Manusmriti sorted families by their relationship to the written word, each boundary enforced by marriage rules; sixty to eighty generations later the wall still shows in allele frequencies."
   },
   {
    "case": "The Jewish diaspora",
    "text": "Tay-Sachs, Gaucher, familial dysautonomia and others at 10 to 100 times the general population: two thousand years of enforced marriage boundaries, from a first-century ordinance about schools, narrowed by a medieval bottleneck to a few hundred founders."
   },
   {
    "case": "China",
    "text": "The keju ran for thirteen centuries, forty generations, and the sorting left claw marks where the exam ran longest and deepest."
   },
   {
    "case": "The Samaritans",
    "text": "A priestly caste copying one Torah by hand for over 2,500 years. The community fell to 146 people in 1917; about 840 live today. Color blindness in roughly a quarter of the men studied (against about 8 percent of European men), and high rates of congenital deafness."
   }
  ],
  "CLOSURE_WITHOUT_A_TEXT": [
   {
    "case": "Finns: isolation",
    "text": "A few thousand founders, forest and ice for a wall, about four thousand years of marrying within: thirty-six disorders in the Finnish Disease Heritage."
   },
   {
    "case": "Amish: a founder bottleneck",
    "text": "A few hundred Swiss and German migrants who reached Pennsylvania between the 1730s and about 1770; Ellis-van Creveld syndrome at rates seen nowhere else."
   },
   {
    "case": "Samoans: selection",
    "text": "Not a bottle but a pressure: the CREBRF variant, under positive selection and associated with increased body mass."
   }
  ]
 }
}