Book excerpt: The collection of essays in The Social Ecology of Border Landscapes defi nes borders and borderlands to include territorial interfaces, marginal spaces (physical, sociological and psychological) and human consciousness. From theoretical and conceptual presentations on social ecology and its agencies and representations, to case studies and concrete projects and initiatives, the contributing authors uncover a thread of contemporary thought and action on this important emerging fi eld. The essays aim to defi ne the territories of social ecology, to investigate how social agencies can activate ecological processes and systems, and to understand how the interactions of people and ecosystems can create new sustainable landscapes across tangible and intangible territorial rifts.