By the age of 46 years old, Elon Musk has innovated and built three revolutionary multibillion dollar companies in completely different fields — Paypal (Financial Services), Tesla Motors (Automotive)…
— Read on medium.com/the-mission/elon-musks-3-step-first-principles-thinking-how-to-think-and-solve-difficult-problems-like-a-ba1e73a9f6c0