Does the structure of prehistoric cemeteries from 2200 BC to AD 500 give insights into social organisation? The first mortuary phase at Khok Phanom Di (ca. 2200 BC) involved a dispersed pattern soon followed by interment in tight clusters laid out on a chequerboard pattern. Then there was a handful of individualising burials followed by burial within structures that might have been specifically for burial, or possibly residence. Bronze Age Ban Non Wat and Ban Lum Khao involved burial in rows, or head to toe. At Noen U-Loke during the later Iron Age, there were clusters, and at Non Ban Jak at the end of prehistoric period, the dead were interred in rooms of domestic houses. This presentation will review possible social scenarios underlying these changes.