Even if all the reforms outlined in Chapter 8 were enacted, the growth imperative would still drive the economic system. This chapter explores ways to move toward an evolutionary path leading to an entirely new system not based on growth and exploitation. It does not offer a blueprint for a utopian future but rather examines the human potential for radical social change given our physical and psychological characteristics, particularly brain plasticity and “evolvability.” Examples of sustainable human societies with very different economic systems from market capitalism are discussed, including Tikopia, Ladakh, and the Inca Empire. These cases illustrate the human capacity for innovation and radical change. As we face an uncertain future, nonmarket economies can at least show us that sustainable and equitable societies are possible. It is not human nature that is preventing us from constructing a better world.