Common Sense on Mutual Funds

Bogle's advice has stood the test of time, but I wonder what influenced his focus on low-cost index funds and long-term investing. Was this based on specific research or personal experience?

The book advocates for straightforward strategies, which contrasts with the often overwhelming financial advice out there. Did this approach help anyone feel more confident about managing their money?

Bogle's critique of active funds and high fees was revolutionary at the time. I’m curious whether his background or experiences led him to take this stance and how he envisioned changing investor behavior.