Every organized system of power — a government, a corporation, a regulator — runs on mechanisms. Not intentions, not mission statements: mechanisms. Structural forces that shape what people actually do, regardless of what they're supposed to do. This lesson is about one of the most reliable mechanisms in the history of governance: regulatory capture. It's the process by which an agency created to oversee an industry gradually starts serving that industry instead. It doesn't require corruption. It doesn't require bad people. It just requires the normal logic of careers, expertise, and proximity to play out over time.

The Federal Aviation Administration was created to keep American skies safe. By 2017, it had a problem: the aviation industry had grown so technically complex that the FAA couldn't hire enough engineers with the expertise to evaluate new aircraft systems. Boeing and Airbus were building things the FAA's own staff couldn't fully assess. So the FAA did something that made bureaucratic sense at the time — it delegated. It authorized Boeing to certify its own aircraft, using Boeing employees designated as FAA representatives. The people checking Boeing's work were Boeing's people.

The 737 MAX needed a new automated system called MCAS — Maneuvering Characteristics Augmentation System — to compensate for heavier engines repositioned on the wing. MCAS could force the nose down if it detected a stall. Boeing's engineers classified MCAS as low-risk, in part because they assumed pilots would quickly override it. That classification meant it received less regulatory scrutiny. The Boeing employees acting as FAA representatives signed off on that risk assessment. The FAA accepted it. Nobody with real independence looked hard at what happened if MCAS activated when it shouldn't — which is exactly what happened on Lion Air Flight 610 in October 2018, and then again five months later over Ethiopia. In both crashes, a single faulty sensor triggered MCAS repeatedly. The pilots fought it. They lost.

The 737 MAX was grounded worldwide in March 2019, three days after the Ethiopian crash. It stayed grounded for 20 months. A subsequent Congressional investigation found that FAA management had pressured its own technical staff to defer to Boeing's timeline and Boeing's risk judgments. Senior FAA officials had come from Boeing. Some returned to Boeing afterward. The revolving door — industry to regulator and back — is not incidental to capture; it's the mechanism. People carry their professional loyalties, their mental models, and their career ambitions with them when they cross that threshold. The institution's stated mission stays the same. The institution's actual behavior drifts. That drift is regulatory capture. And the 737 MAX is what it looks like when the drift goes far enough.