A seed system is the value chain of seed savers, plant breeders, distributors and farmers, who collectively define, breed, and distribute the seeds of our food crops. Governing seed systems is a complex problem, as it wrestles with issues of innovation, intellectual property, food security, and agroecological resilience. These issues become increasingly important in the face of climate change, as seeds and their genetic diversity are one of the greatest tools we have for climate change adaptation.