Climate change, poverty, waste, inequity, pollution, the loss of biodiversity, the breakdown of society: these 21st century challenges are symptoms of a planet in distress, a planet driven by industrialism to the threshold of collapse. Climate change and environmental degradation impact water, land, biodiversity, and other natural resources, and the socio-economic systems and structures upon which the food commons depend. This degradation will exacerbate the existing undernutrition problem and, at the same time, undernutrition undermines climate resilience and the climate adaptation capacity of vulnerable populations. In concrete terms, undernutrition mortgages the possibility of building a food commons regime.