Guy Sims Fitch had a lot to say about the world economy in the 1950s and '60s. He wrote articles in newspapers around the globe as an authoritative voice on economic issues during the Cold War. Fitch was a big believer in private American investment and advocated for it as a liberating force internationally. But no matter what you thought of Guy Sims Fitch's ideas, he had one big problem. He didn't exist.