"And When the Last Law Was Down …” (Part 3 of 4)

Core idea

The third part of the topic is the cost-comparison fight. Moses produced a printed brochure — Brooklyn-Battery Crossing — arguing that the bridge would cost $41.2 million and the tunnel $84 million, that the bridge was therefore the responsible choice. Reformers tore the figures apart. They showed that Moses had under-counted bridge approach ramps and overlooked tunnel-construction efficiencies. By the end of the cost fight, Moses's numbers had been discredited and the political balance had shifted.

Why it matters

The brochure as propaganda

Moses had produced cost brochures for many earlier projects and never had them seriously challenged. The Brooklyn-Battery brochure was different — the opposition included people with cost-estimating expertise (transportation engineers, RPA staff) and the budget to commission counter-estimates. The brochure's numbers were systematically attacked.

The reformers' counter-estimates

RPA-commissioned counter-estimates showed Moses had under-counted bridge ramps, overestimated tunnel cost, and applied different cost methodologies to the two options. The technical critique landed. Editorial boards that had taken Moses's numbers at face value now hedged.

Key takeaways

Mental model

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Practical application

Example

Bernie Madoff's investment-return numbers were taken at face value for decades because the consistency built credibility. When the credibility cracked in 2008, the entire historical pattern was reread retrospectively. The same logic applies to Moses's cost estimates after 1939.

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