I.

The sky over New York in 1924 was the color of a bruised peach, and from the observation deck of the Chrysler Building, Leo Marchetti could see the world as it was -- a city of steel and ambition, crawling with men who wanted everything and understood nothing.

His airship, the Aethelred, hung tethered to the roof like a sleeping leviathan. It was a small vessel compared to the luxury liners that plied the transatlantic routes, but it carried something more valuable than passengers or cargo: the atmospheric generator that Leo had built in his grandfather's basement.

The generator could pull energy from the air itself -- from the static charge between cloud and earth, from the thermal differentials between day and night. It was clean, infinite, and completely incompatible with the oil economy that powered Wall Street.

II.

The call came at dawn. Mr. Sterling from J.P. Morgan's firm wanted to meet. Leo knew what that meant: they had found out about the generator.

The meeting took place in a room so large that Leo's footsteps echoed like gunshots. Mr. Sterling sat behind a desk that could have served as a football field.

"Mr. Marchetti," Sterling said without preamble. "We understand you have developed an energy technology that could disrupt the entire petroleum industry."

Leo said nothing. He had learned long ago that silence was a weapon.

"We are prepared to offer you twenty million dollars for the exclusive rights to your invention."

Twenty million. It was more money than Leo had ever seen. It was also, he realized with a sudden clarity, a bribe to destroy it.

"And if I refuse?" he asked.

Sterling's smile was thin. "Then the government will find reasons to revoke your building permits. Your suppliers will develop sudden quality issues. Your employees will discover better offers. The world has a way of correcting things that don't fit."

III.

Leo spent the night on the roof of the Chrysler Building, sitting next to the Aethelred's generator. The city glowed below him like a spilled jewelry box, and he thought about his grandfather -- an Italian immigrant who had come to America with nothing but a soldering iron and a dream.

Grandfather had built radios. Leo had built the generator. Each generation had reached a little higher, climbing the steel ladder toward something that might have been progress, if progress had ever been defined as making the world better for people who weren't already rich.

At three in the morning, he made his decision.

IV.

The next morning, Leo did not go to J.P. Morgan's office. Instead, he went to the offices of every major newspaper in New York and gave them each a copy of the generator's complete specifications.

"Publish this," he told them. "All of it. How it works, how to build it, how to maintain it. Give it to the world."

The reporters looked at him as if he had offered them gold. But he had something better: a story that would sell every paper in the country.

By sunset, the story was everywhere. The generator specifications were being reprinted in newspapers from Boston to San Francisco. Within a week, engineers across the country were building their own versions. Within a month, the oil economy was in chaos.

Mr. Sterling sent men to collect the original generator. They found it gone -- Leo had disassembled it and scattered the parts across three cities.

V.

Leo Marchetti died in 1963, poor but content, in a small apartment in Vermont. He never saw the world the generator had created -- a world of clean energy and political upheaval, of oil barons ruined and new industries born.

On his desk, where his grandfather's old soldering iron still rested, was a single note:

"The sky belongs to everyone. That was the point all along."