CONCEPT
Engineering as Stewardship
Petroski's organizing moral frame for the profession: the engineer as custodian of structures on which human lives depend, carrying the weight of consequence that no tool can share, charged with a form of care that cannot be automated because its essential feature is the capacity to be changed by responsibility.
The steward does not own what she protects. She maintains it. She inspects it. She worries about it. She lies awake wondering whether the design anticipated the conditions that tomorrow will bring. Petroski's final
framing of the engineering profession was in these terms — not as problem-solving, optimization, or innovation, but as stewardship: the custodianship of the structures (bridges, buildings, power systems, water systems, the physical infrastructure of civilization) on which human lives depend. The framing matters because it specifies what cannot be automated. AI can calculate. AI can optimize. AI can generate designs at extraordinary speed and comprehensiveness. What AI cannot do — because its architecture does not include the capacity — is carry
the weight of the lives that depend on the soundness of its output. That weight is the engineer's, and it is what makes engineering a human activity in the deepest