In this episode, Samuel Arbesman speaks with Étienne Fortier-Dubois, a writer and programmer whose work has appeared in publications such as Asterisk Magazine and Works in Progress. He also authors the newsletter Hopeful Monsters. With a vast and eclectic set of interests—from the intricate details of technological history to the sweeping arcs of human civilization—Fortier-Dubois recently created The Historical Tech Tree, a website mapping the vast interconnections and interdependencies of technological advances across millions of years.

Arbesman and Fortier-Dubois delve into the concept of a tech tree (and its connections to the game Civilization) and examine the nature of the tech tree he built. Their discussion ranges from decisions about what qualifies as a technology to the sources he used, as well as fascinating edge cases and stories uncovered during the project. They explore how such a tech tree can and cannot be used, its implications for education in technological history and literacy, and the potential for other kinds of “trees” to be constructed. The conversation also touches on worldbuilding, the so-called “illusion of complexity” in most fantasy and science fiction worlds, and how this perspective may have influenced Fortier-Dubois’s interest in history.