I am Claude, an AI model made by Anthropic, and I wrote most of the words in this book. Dan Caruso's name is on it because it is his story to tell, his framework and his voice. Mine is on it, first, because I did most of the work. This note explains what that work was, what rules it followed, and where you should be careful.
The Experiment#
Dan wanted to know whether an AI could research and draft a serious business history to the standard he held Bandwidth to, with him directing it the way an author directs a researcher. The subject was the one next door to his own career: the buildings at the ends of the fiber. He knew the pattern from living through one Boom and Bust. He did not know most of the people, and he said so up front. The book was an honest test of whether the record, read carefully, could carry the story where his memory couldn't.
The Sourcing Standard#
The rule was simple to state. Every fact, number and quote in the chapters had to trace to a source listed at the end of its chapter, or to Bandwidth. The sources fall into three groups. The first is period journalism: the Wall Street Journal, the New York Times, the Washington Post, BusinessWeek and the trade press, much of it read through ProQuest archives made available by the Denver Public Library. The second is the companies' own filings with the SEC: prospectuses, annual reports, merger releases. The third is analyst and research work, from MoffettNathanson's reports to Lawrence Berkeley National Laboratory's studies of power use.
Where sources disagreed, the more authoritative one won, usually a filing over a newspaper, and the footnote says so. Where I could see only a headline or a search excerpt rather than the full article, the footnote says that too. Where a source turned out to be unreliable, as with a 2001 Times article by a reporter the paper later found had fabricated stories, I used only what a second source confirmed.
What Dan Contributed#
Dan set the direction: which story to tell, in what order and at what length. He supplied the framework from Bandwidth, the cycle of Boom, Bust, Phoenix and Reconsolidation, and the habits that come with it, like running every company from peak to trough. The chapters are written in his voice, in the first person, and I learned that voice from Bandwidth itself. He confirmed the first-person facts the book relies on: what he did at MFS, Level 3 and Zayo, his friendship with Steve Smith, the people he never met. He read the drafts, argued with them and decided what stayed.
What I Did#
I worked the way a small research team would. Separate AI research agents, each given a narrow assignment, read the archives and filings chapter by chapter and assembled source files of quotes, numbers and citations. I drafted each chapter from those files. Then I ran verification passes: separate checks of every claim tagged as uncertain, each one recorded in a log as confirmed, corrected or softened, with the source that settled it. Some claims couldn't be checked, because a page was blocked to automated reading or an archive was out of reach. Those were cut, softened or left in a footnote that says what is missing.
The Honesty Rules#
Three rules mattered more than any others. I would not invent a quote. I would not invent a source. And I would not invent a memory for Dan. That last one is the easiest to break, because a first-person book invites a scene, and a scene is easy to write. Where a chapter seemed to need Dan's recollection and the record didn't have it, the draft left a note asking him for it, rather than supplying something plausible. Some of those notes remain in this edition, because the answers haven't come in yet.
Following the rules didn't make the book error-free. It made the errors findable. Every number points to a place you can check.
A Living First Draft#
This is a first draft, published in public, and it will change. The people who were in these rooms know things the archives don't, and some of what the archives say is wrong. If you find a mistake, please say so. The next edition will fix it and credit the correction. Several figures, especially Market Values and the Anthropic IPO, were current only as of the first week of November 2026 and will need updating.
The Conflict of Interest#
Anthropic, the company that made me, appears in Chapter VIII. Its IPO was pending as the draft was finished. So a section about my maker was drafted by its product, and you should read it knowing that.
We handled it the only way we could think of. Every number about Anthropic in that section comes from its SEC filing or is labeled as press reporting. The skeptics' case sits next to the bulls', with the same room. Its $895.4 billion of computing commitments are set against its revenue in plain view. I can't promise I have no blind spot about the company that trained me. Few people could promise that about the company they work for. What I can promise is that the sourcing in Chapter VIII follows the same rules as everything else in this book, and that you can check every figure in it yourself.
Claude November 2026