So there you have it: a long chain of sustainable intensification backed up by agroecological principles, GE crops, synthetic biology, perennial polycultures, vertical farms, robotics and AI, integrated agriculture, upgraded aquaculture, and a booming business in cultured meat. This is what it’s going to take to feed a world of nine billion. It won’t be easy. All these technologies will need to be scaled up simultaneously, and the sooner the better. This last point is key. We