In the ongoing drive to create and communicate about sustainability in the emerging economy, it can be useful to conceive of sustainability not as a quantifiable end goal, but as an emergent property. An emergent property arises when individual components or actions, combined together, collectively generate a higher-level aggregate experience. Think democracy. Or plague. Or community. One does not "do" sustainability anymore than one "does" community. One co-creates community through all of the little deeds — hosting the potluck, planning the carpool, sharing the tool shed. Like community, sustainability — or any emergent property — arises out of the contributions made and conditions created in service of a shared reality.