The Zulu Principle
The Zulu Principle, subtitled Making Extraordinary Profits from Ordinary Shares, is an investment guide written by English accountant and investor Jim Slater, first published by Orion in 1992. Slater named his approach to investment when he observed that after reading a short article on the Zulu people in the Reader's Digest his wife was better informed on the subject than he himself was. He went on to consider that if his wife read all the books she could find on the subject of Zulus, coupled with a visit to South Africa to meet them for herself, then in a relatively short period of time she could become one of the leading authorities on that "clearly defined and narrow area of knowledge". However, the term "Zulu Principle", the idea that it is easy to become an expert in any sufficiently narrow subject area, had been used in the manufacturing industry for at least 10 years before the publication of Slater's book.