The book examines contemporary urban challenges and opportunities within the context of the traditional Malthusian theory. The book reorients the classic Malthusian debate on population and food by focusing on global urbanisation and its consequences for peoples' access to basic means of subsistence. Case studies from both developing and developed countries provide a comprehensive overview of the issues related to availability of food and water in an urban context. The book suggests that the concern for human survival is still relevant and can be exacerbated by rapid urbanisation, and that the negative impacts of urban processes require an increased attention of the international community as we enter the new Sustainable Development Goals era.