Source: https://www.bogleheads.org

The Bogleheads investment philosophy promotes a simple, low-cost approach to investing based on index funds and passive management. Derived from the work of John Bogle, founder of Vanguard, it emphasizes key principles like living below your means, diversifying investments, minimizing costs and taxes, and avoiding market timing. The website provides a wealth of resources, including articles, videos, and a forum where members can discuss and refine their investment strategies. It is specifically designed for U.S. investors, though a separate section provides information for non-U.S. investors.