The New Geography of Human Survival: Climate Change, Resource Insecurity and the Reshaping of Habitable Space

Abstract

Human survival has always depended on geography, but the meaning of a “habitable place” is changing. Climate warming, extreme heat, water stress, food insecurity, ecosystem degradation, disasters, rapid urbanization and population mobility increasingly interact with inequality and uneven adaptive capacity. This conceptual review examines these interactions as a new geography of human survival. It draws on authoritative assessments and datasets from the Intergovernmental Panel on Climate Change (IPCC), World Meteorological Organization (WMO), World Health Organization (WHO), UN-Water, Food and Agriculture Organization (FAO), International Labour Organization (ILO), World Bank and United Nations Office for Disaster Risk Reduction (UNDRR). The evidence shows that approximately 3.3–3.6 billion people live in contexts highly vulnerable to climate change; 2.1 billion people still lack safely managed drinking water; about 673 million people experienced hunger in 2024; and heat stress is projected to reduce global working hours by 2.2 per cent in 2030 under the ILO scenario. The article argues that habitability cannot be reduced to temperature or physical occupancy. It is produced through the interaction of environmental tolerance, water and food security, health, livelihoods, infrastructure, governance, technology and social equity. The same climatic hazard can therefore create very different human outcomes in different places. A new geographical distinction is emerging between high-resilience and low-resilience spaces. The paper concludes that the central challenge is not merely to identify where people can physically remain, but to build places where they can live safely, productively and with dignity. Climate-resilient development, anticipatory adaptation, inclusive urban planning, risk-informed infrastructure and justice-centred governance are essential to this transition.