Rebuilding after Madiun: The Indonesian Communist Party's Strategy of Mass Mobilization in Central Java, 1948–1955

Abstract

The Madiun Affair of September 1948 left the Indonesian Communist Party (Partai Komunis Indonesia, PKI) branded as a rebel organization, its leadership killed or imprisoned and its local networks scattered. Yet seven years later the party came fourth nationally in the 1955 general election, and Central Java delivered the largest share of its national vote. This article explains how that recovery was achieved in the province where the uprising had unfolded. It addresses two questions: what social and political conditions in Central Java between 1948 and 1952 shaped the party's revival, and which strategies the PKI used to build a mass base that it converted into electoral support in 1955. Using the historical method of heuristics, source criticism, interpretation and historiography, the study draws on PKI publications, the party press (Harian Rakjat, Bintang Merah and Suara Tani), regional newspapers (Kedaulatan Rakjat and Suara Merdeka), a provincial government yearbook, archival letters and the secondary literature. It interprets the evidence through Charles Tilly's mobilization model and through framing analysis. The article argues that the PKI's success was neither a simple product of organizational skill nor an automatic consequence of poverty. It resulted from a cumulative sequence: identifying a social base among the abangan peasantry and urban workers, framing socio-economic grievances as collective class injustice, mobilizing workers and peasants through SOBSI and BTI, and converting this organized constituency into votes through an intensive, culturally embedded campaign. The study contributes a provincial-level reconstruction of PKI mass-building that links post-Madiun reorganization to electoral outcomes. It also shows the structural limits of this strategy: the party depended on its alliance with the nationalists and on vertical village loyalties, and it remained weak among the santri.