The Indonesian killings of 1965–1966: the case of Central Java

The mass killings of 1965-1966 in Indonesia marked a watershed in its history. The consensus estimate of lives lost is 500,000. In this paper, demographic and geographic methods are used to characterize the violence in Central Java, one of the worst-affected provinces. The findings provide a portrait of the violence and its dynamics. This portrait highlights the likely complicity of a diverse array of political opponents of the Indonesian Communist Party (PKI). The findings also provide evidence supporting Clifford Geertz's three-aliran (cultural "stream") model of Javanese society, with the complex interplay of the three aliran and the Indonesian Army in the political realm producing the violent outcomes of 1965-1966. In this manner, this study builds on prior work by Hefner, Jay, Lyon, Mortimer, and Ricklefs on the cultural and social underpinnings of the violence. It also builds on more recent work on the neighboring province of East Java in which the role of two of the three alirans was found to be a significant factor, underlining the importance of the intersection of culture, geography, and politics in understanding this violent episode in Indonesian history.