What is BJJ lineage and why does it matter?

In BJJ, your lineage shows who your instructor learned from, who their instructor learned from, and so on back to the Gracie family or other founding figures. This matters because BJJ does not have a single governing body that certifies instructors, so lineage serves as a form of quality control. Legitimate lineage generally means the instructor received their belt from a recognized black belt. However, some excellent instructors come from lesser-known lineages, and some well-known lineages produce mediocre teachers. Red flags include instructors who are vague about their training history or who promoted themselves. When evaluating a gym, lineage is just one factor alongside the instructor ability to teach, student satisfaction, and the training environment.