RESUMEN
In 1939, directly after the worst earthquake in the country's history, the Chilean state began implementing an electrification program. This plan shaped energy goals for years to come and defined the interconnected grid that dominates the country's energy infrastructure today. Based on extensive archival work, this article describes the birth of energopolitics in the country, using technology sociologist Michel Callon's notion of "interessement" to describe the strategies of a group of engineers who acted as system builders. Their four main strategies were embracing technological futurisms, forging heterogeneous networks, articulating and mobilizing knowledge, and using crises as windows of opportunity for change. The article shows not only the historical impact of past energy choices on today's world but also that current challenges to energy transitions are not without precedent. Using a sociological framework to tell this story allows us to highlight the mechanisms through which energy systems can change.