Book excerpt: Advances in Food Security and Sustainability, Volume Four, takes a scientific look at the challenges, constraints and solutions necessary to maintain a healthy and accessible food supply in different communities. This ongoing series addresses a wide range of issues on food sustainability and security, with this release focusing on The Evolution of Food Security Policy in Lao PDR: Continuity and Change in the Era of the Sustainable Development Goals, Food System Resilience and Diversity, A Pliable Pillar: How the Social Dimension of Sustainability Has Been Framed in UK Public Food Policy, and much more. - Contains expertise from leading contributions on the topics - Covers a vast array of subjects relating to food security and sustainability - Explores challenges related to protecting environmental resources while also meeting human nutritional requirements