An issue on narrating shared futures (‘How will we live together?’) implies being able to conceive of a mutual and shared experience. The history of shared heritages often contains other figures in the margins: those who were not seen as part of the dominant cultural narrative, or whose contribution to its heritage went unacknowledged. The holistic view of the 2018 Davos declaration on Baukultur embraces a more integral view of the built environment and society. In order to explore some of the cultural narratives that shape our past and envision a shared future, this article takes a closer look at three science fiction authors and how their stories draw lessons from the past into a narration of possible futures. Ursula K. Le Guin, Octavia Butler and Margaret Atwood have each envisioned futures that draw from contemporary developments and expand them to an overarching logic as the setting of their tales. Rather than directly examining (un)built heritages, this article examines the underlying cultural logic of building on the past. If architecture provides a foundation for a shared (and inclusive) future, the stories constructed by these authors show how the built environment resonates with societal principles, aiding or hindering particular collective values.