Stay the Course is John Bogle's 2018 account of building Vanguard and the indexing revolution, told from his perspective as the founder who was fired from his previous firm, started Vanguard from a corporate backwater, and launched the first index fund against near-universal ridicule. It covers both the institutional history — Vanguard's mutual structure, the no-load decision, the regulatory battles — and Bogle's personal philosophy of serving the investor.
This is the subject of Founders episode #57, and Senra frames Bogle's career as a pure case study in conviction under ridicule. Bogle knew index funds would work because the math was undeniable, but for two decades he was called 'Bogle's Folly' by the entire industry he was trying to reform. Senra draws the lesson that being right is not enough — you must also be willing to be isolated for being right.
Bogle's structural innovation — the mutual, investor-owned structure with no outside shareholders — is Senra's focus. Bogle didn't just offer low-cost funds; he built a company that could not profit from anything but serving its customers, because the customers owned the company. For founders, this is the deepest form of alignment: design your incentives so that the only way to win is to deliver the value you promised.
The book also documents Bogle's firing from Wellington, which Senra uses to argue that a founder's career often has a 'preparatory failure' — a setback that clears the path for the real work. Bogle could not have built Vanguard the way he did if he had stayed at Wellington, and the mutual structure was partly a response to the conflicts he saw there.