John "Jack" Bogle revolutionized the investment industry by opening the first index fund in 1976 to replicate the S&P 500 index. It was not easy to sell the idea of a fund generating average market results. But Bogle has shown that by lowering costs he can outperform actively managed funds.

Eric Balchunas, author of the fantastic book titled "The Bogle Effect. How John Bogle and Vanguard Turned Wall Street Inside Out and Saved Investors Trillions" is my podcast guest today. It's a semi-documentary book with numerous interviews by Eric, including Jack Bogle and even Warren Buffett. The book described the genesis of a great revolution in the financial world - the passive revolution.