In 1961, the 23-year-old heir to one of the world’s greatest fortunes vanished without a trace off the coast of Dutch New Guinea, and history split in two. One version is a tragic drowning at sea. The other is a chilling story of colonial blowback, a sacred headhunting ritual, and a decades-long geopolitical cover-up.

This episode sifts through Carl Hoffman’s investigation, the memoirs of Michael’s twin sister Mary, and declassified Dutch colonial files to weigh both theories. We trace Michael’s pivot from Harvard to anthropology, his fatal decision to swim for shore after two days clinging to a capsized boat, and the cultural and political forces, including a 1958 massacre by Dutch authorities, that may have sealed his fate.

• Michael abandoned his overturned 40-foot dugout canoe and swam for shore using two cans and a gas tank as a float, never to be seen again
• Missionaries gathered nearly identical accounts from four separate villages describing him reaching shore, being killed, and his remains divided among 15 Asmat men
• A patrolman was handed a skull with no lower jaw and a hole in the right temple, the hallmarks of ritual headhunting, but Dutch authorities buried the investigation
• The cover-up was driven by fragile 1960s decolonization politics; admitting the governor of New York’s son was killed would have been a geopolitical disaster
• His Asmat artifacts now fill the Michael C. Rockefeller Wing at the Met, while villagers came to view a later cholera epidemic as cosmic retribution