On November 1, 1700, a doctor in Madrid cut open the body of Charles II of Spain and found a heart the size of a peppercorn, corroded lungs, rotten intestines, and a single blackened testicle. His inbreeding coefficient was 0.254. A child born to a brother and sister averages 0.25.
The Habsburgs married their way to half of Europe in three generations. Maximilian I wed Mary of Burgundy in 1477. His son Philip the Handsome married Joanna of Castile in 1496. The Vienna Double Wedding of 1515 locked in Hungary and Bohemia. Then the winning strategy turned fatal. The dynasty ran out of families worth marrying, so they married each other. Uncle to niece, cousin to cousin, generation after generation, with papal dispensations rubber-stamped for every match.
The consequences showed up in the bodies. Charles V could not close his mouth; Titian learned to paint around it. Don Carlos roasted animals alive and attacked the Duke of Alba with a knife. Philip IV lost eleven of twelve legitimate children. Margaret Theresa, the girl in Velazquez's Las Meninas, was dead at twenty-one from six pregnancies in six years. Her brother Philip Prospero was painted wearing protective amulets because the court expected him to die. He did. Charles II arrived five days later.
When Charles II died childless in 1700, the succession crisis triggered the War of the Spanish Succession, which killed 700,000 to 1.25 million people and ended Spain as a dominant European power.
📍 TIMESTAMPS:
0:00 — The Autopsy of Charles II
1:31 — How the Habsburgs Married Their Way to Power
3:31 — When Winning Too Much Becomes the Problem
4:01 — The Cymburgis Myth: Who Really Caused the Habsburg Jaw?
5:32 — The Jaw Is Not What You Think It Is
6:32 — Charles V: The First Habsburg Who Couldn't Close His Mouth
8:02 — Don Carlos: The Prince Who Roasted Animals Alive
10:02 — Philip II Arrests His Own Son in Full Armour
11:02 — Joanna the Mad Was Not Actually Mad
12:32 — 46 Years of Confinement with Rope Torture
14:02 — Philip IV: Twelve Children, One Survivor
15:02 — The Girl in Las Meninas, Dead at Twenty-One
16:02 — Philip Prospero: Painted in Talismans
16:32 — Royal Babies Dying Faster Than Peasant Children
17:02 — Charles II: El Hechizado, The Bewitched
18:02 — The Exorcism of the King of Spain
19:02 — The Pedigree Detail the Internet Always Gets Wrong
19:32 — The Alvarez Study: Inbreeding Coefficients Generation by Generation
21:03 — What Did Charles II Actually Have?
23:03 — The Ptolemies, Bourbons, and Why the Habsburgs Were Different
24:33 — Ferdinand I: The Habsburg Everyone Forgets
27:04 — Joseph Ferdinand: The Six-Year-Old Who Could Have Prevented a War
28:34 — The War of the Spanish Succession
30:04 — Henry Kamen's Dissent: Was It Biology or Economics?
31:34 — The Lorraine Outcross: One Marriage That Fixed Everything
📚 SOURCES & FURTHER READING:
https://archive.org/details/spainundercharle00stanhttps://journals.plos.org/plosone/article?id=10.1371/journal.pone.0005174https://www.tandfonline.com/doi/full/10.1080/03014460.2019.1687752https://www.nature.com/articles/hdy201325📋 ABOUT THIS VIDEO:
This video examines the Habsburg dynasty's two-century pattern of consanguineous marriage from Maximilian I's marriage to Mary of Burgundy in 1477 through the death of Charles II of Spain on November 1, 1700, including the inbreeding coefficients calculated by Gonzalo Alvarez's 2009 PLoS ONE study across Philip I (F=0.025), Charles V (F=0.037), Philip II (F=0.123), Philip III (F=0.218), Philip IV (F=0.115), and Charles II (F=0.254), the role of papal dispensations in enabling nine of eleven uncle-niece and cousin marriages, the 29.4% infant mortality rate among Habsburg royals compared to 20% among Spanish peasants between 1527 and 1661, the mandibular prognathism and maxillary deficiency measured across 66 portraits by Vilas and Ceballos in 2019, the revisionist scholarship of Bethany Aram on Joanna of Castile's 46-year confinement at Tordesillas, Don Carlos's frontal lobe contusion at Alcala de Henares in 1562, Philip IV's marriage to his own niece Mariana of Austria at Navalcarnero in 1649, Margaret Theresa and Philip Prospero painted by Velazquez, the exorcism investigation by Inquisitor General Tomas de Rocaberti in 1698, the War of the Spanish Succession (1701–1714) triggered by Charles II's childless death, the Treaty of Utrecht of 1713, Ferdinand I of Austria's hydrocephalus and epilepsy from a double-first-cousin marriage in 1793, and Maria Theresa's 1736 outcross marriage to Francis Stephen of Lorraine that reset the dynasty's genetic trajectory.
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