As a member of the "people operations" (human resources) staff at Google in the mid-2010s, Harvard Griffin GSAS historian of science Tina Wei was struck by how many perks employees received in the office: door-to-door shuttle service to work, fitness classes, massages, and pantries stocked with snacks, to name just a few. The company even offered a meditation program—with its own branding worked in. In this talk delivered in April 2024 at the annual Harvard Horizons Symposium, Wei argues that, while physiological research on bodily fatigue was originally used to support calls for better protection of US laborers’ safety, over time views of fatigue as a mental issue gave employers an excuse to avoid investing in improvements to working conditions.