Fluid Histories and Unruly Waters

The Brahmaputra River System, Political Ecology, and the Making of Pre-Colonial Assam

Abstract

This paper examines the Brahmaputra River system as a central agent in the history of pre-colonial Assam, demonstrating how the ecological rhythms, shifting course, and socio-environmental dynamics of the Brahmaputra and its tributaries shaped the region’s social, political, and cultural trajectories. Through a political ecology reading of copper-plate land grant charters, royal chronicles (buranjis), and narrative texts spanning the fifth to eighteenth centuries CE, the paper argues that the Brahmaputra’s structural “unruliness”—its high sediment loads, catastrophic floods, constant channel migrations, and ecological unpredictability—generated a specific political logic: rulers who mastered hydraulic governance commanded the territory. Importantly, the Brahmaputra system was never static. Its capricious migrations and periodic floods compelled resilience: capitals were relocated, embankments and canals constructed, and new settlements established on the freshly deposited lands. Rulers who recognized the dual nature of rivers—fertility and devastation, connection and division—could better consolidate power and safeguard agrarian regions. The paper further contends that ordinary people were not passive subjects of a river-shaped landscape but active negotiators of its possibilities. By integrating geological dynamics, political ecology, and longue-durée analysis, the study reveals a fluid history in which the Brahmaputra’s unruliness was simultaneously a threat to be managed, a resource to be harnessed, and a force that ultimately thwarted every human attempt at mastery.