This introductory chapter presents the concept of the book, Brunei and the Future Transformation of Southeast Asia. It explains the choice of Brunei as a focus, not to serve as a model or exemplar, but as a vantage point to view the global changes that are unfolding before us, and consider our readiness to navigate the challenges anticipated. The main aim is to consider details to understanding realities of smaller areas, which are typically ignored because of the tendency to focus on more important and salient features. The rationale for adopting a geographical approach is then explained and elaborated. Geographical applications of ‘regions’ are illustrated, using the following themes: physical environment; ecosystems; pre-modern regions; colonial blocs; independent countries; and ASEAN. It concludes by providing brief overviews of the chapters: Changing Realities (Chap.  2 ); Climate Change and Sea Level Rise in Southeast Asia: Current Knowledge and Future Projections (Chap.  3 ): Changing Global Order and Climate: A Comparative Analysis of Cartesian and Organismic Perspectives (Chap.  4 ): Food Security Using Rice Production in Brunei Darussalam as a Case Study (Chap.  5 ); ASEAN’s Halal Production Networks: Towards Regional Integration and Effective Industrial Governing (Chap.  6 ); Young Consumers’ Understanding of Sustainable Consumption (Chap.  7 ), Politics and Security in Southeast Asia (Chap.  8 ); Unpacking Women’s Participation in Disaster Management: Insights from the Philippines and Its Diaspora (Chap.  9 ); Brunei and the Maritime Silk Road (Chap.  10 ); Southeast Asia: Mobility, Development and Long-term Plan (Chap.  11 ); and Migration Routes in Southeast Asia: How Economy Shapes the Routes (Chap.  12 ).