The automobile was in many respects the defining commodity of the twentieth century. Its importance didn’t stem from technological virtuosity or the sophistication of the assembly line, but rather from an ability to reflect and shape society. The ways in which we produced, consumed, used, and regulated automobiles were a window into twentieth-century capitalism itself — a glimpse into how the social, political, and economic intersected and collided.

Today, in a period characterized by financialization and globalization, where “information” is king, the idea of any commodity defining an era might seem quaint. But commodities are no less important today, and people’s relationships to them remain central to understanding society. If the automobile was fundamental to grasping the last century, the smartphone is the defining commodity of our era.

People today spend a lot of time on their phones. They check them constantly throughout the day and keep them close to their bodies. They sleep next to them, bring them to the bathroom, and stare at them while they walk, eat, study, work, wait, and drive. Twenty percent of young adults even admit to checking their phones during sex.