The gig economy, precarious work, and nonstandard employment have forced labor law scholars to rethink their discipline. Classical remedies for unequal power, capabilities approaches, "third way" market regulation, and laissez-faire all now vie for attention - at least in English. Despite a deep history of labor activism, Latin American scholarship has had scant presence in these debates. This book introduces to an English-language audience another approach: principled labor law, based on Latin American perspectives, using a jurisprudential method focused on worker protection. The authors apply this methodology to the least likely case of labor-protective jurisprudence in the industrialized world: the United States. In doing so, Gamonal and Rosado focus on the Thirteenth Amendment as a labor-protective constitutional provision, the National Labor Relations Act, and the Fair Labor Standards Act. This book shows how principled labor law can provide a clear and simple method for consistent, labor-protective jurisprudence in the United States and beyond.