Schultz was associated with the
libertarian movement and wrote a guide to using Swiss banks. He is credited with inventing the
Three Flags Theory which proposes that everyone should have a second passport, an address in a
tax haven and that their assets should be kept outside their home country. According to
New Internationalist magazine, he was one of the trustees of the
Phoenix Foundation which unsuccessfully attempted to establish small libertarian states in the 1970s. In 1991, he produced
On re-making the world: Cut nations down to size, which argued that there were too many large and inefficiently run nations in the world and that they should be broken up to encourage peace, prosperity and better government. Often gloomy about the future, Schultz, advocated a return to the
gold standard and sound money. In 1982,
The Observer said that his "record as a prophet of doom is probably second to none" and reported that a group known as the Friends of Harry Schultz had met in Cannes to plan for upcoming trouble by "establishing alternative identities (with appropriate passports), building nuclear shelters, setting up their own bank, learning to fly their own planes, and sail their own boats, locating isolated hide-outs, and assembling survival kits". ==Personal life and death==