Just been thinking about the investment gurus who actually shaped how we approach money today, and it's wild how many of their core principles still hold up.

Warren Buffett is obviously the first name that comes to mind. The guy's been preaching value investing and patience for decades while everyone else chases quick wins. His whole thing is understanding what you're buying before you buy it - reading annual letters and diving deep into company fundamentals. People still study his approach because it works.

Then there's John Bogle, who basically democratized investing by creating index funds for regular people. His message was simple but revolutionary: most active managers underperform the market, so why pay high fees? That passive investing philosophy he championed has become the foundation of how millions of people invest now.

Charlie Munger deserves way more credit than he usually gets. Working alongside Buffett at Berkshire, Munger brought this incredible analytical approach using mental models to break down complex problems. He's all about simplicity and understanding things deeply - no overcomplicated strategies.

Ray Dalio took a different angle with Bridgewater Associates, focusing on data-driven decision making and understanding how global economies actually work as systems. His principles-based approach to both investing and life has influenced a whole generation of portfolio managers.

Benjamin Graham, who people call the father of value investing, basically wrote the playbook. His concept of intrinsic value - buying stocks below what they're actually worth - became the foundation for investors like Buffett. If you read The Intelligent Investor, you'll see why it's still considered essential.

Peter Lynch showed that you don't need to be a genius to beat the market. His 'invest in what you know' philosophy meant everyday people could spot opportunities in companies they actually understood. He turned Fidelity Magellan into a powerhouse with those principles.

Jim Simons represents the modern investment guru approach - using math, algorithms, and data instead of traditional analysis. Renaissance Technologies and his Medallion Fund proved that technology and rigorous research could transform investing.

The takeaway? These investment gurus all had different methods, but they shared discipline, research, and long-term thinking. Whether you're into value investing, passive index funds, or quantitative approaches, there's something to learn from each of them. The best part is their teachings are all documented - books, interviews, letters. If you're serious about building wealth, studying how these figures think is probably the best education you can get.