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The Amazonian frontier, shaped by developmentalist policies in the 1970s and 1980s and a socio-environmental response in the 1990s, has historically been a site of widespread violence and environmental destruction. After the imposition of new environmental governance measures in the mid-2000s, deforestation rates in the Brazilian Amazon dropped to historic lows. Many analyses of this 'greening' of Amazonia operate within a limited historical perspective that obscures complex and still-evolving contestation among diverse actors and projects. The long-term evolution of the frontier is illustrated dramatically in the municipality of São Félix do Xingu (São Félix). Emerging as a 'contested frontier' in the 1970s, São Félix in the early 2000s lost over 1000 km 2 of forest annually, but since the mid-2000s, the municipality has entered a period of 'greening'. This contribution deploys a historical political ecology framework to analyse how decades of agrarian frontier change and land conflicts among actors on the ground interacted with shifting national policy debates. Nearly a half-decade of field research in São Félix is combined with data from a 2014 field 'revisit' to situate the current 'greening' of policy and discourse within the longer term history of frontier development, revealing positive social and environmental developments and persistent contradictions and uncertainties.

Environmental non-governmental organizations (ENGOs) exist worldwide, and since the 1980s they have increasingly influenced global environmental politics and environmental discourse. We analyze an original dataset of 679 ENGOs participating in global environmental conventions in the mid-2010s, and we apply quantitative content analysis to ENGO mission statements to produce an inductive typology of global environmental discourse. Discourse categories are combined with ENGO attribute data to visualize the political topology of this globally-networked ENGO sector. Our results confirm some common assertions and provide new insights. ENGOs are more diverse than conventionally recognized. Quantitative evidence confirms strong North-South disparities in human and financial resources. Four primary discourses are identified: Environmental Management, Climate Politics, Environmental Justice, and Ecological Modernization. We compare our typology to existing literature, where Climate Politics and Environmental Justice are under-appreciated, and we discuss ways to expand on the data and methods of this study. Synoptic empirical ENGO research is essential to accurately understanding the ENGO sector and global environmental politics.