A business guru or management guru is a leading authority on business practices and can be defined as 'a person with influential ideas or theories about business'. The earliest use of the term business guru can be tracked back to the 1960s being used in Business Week. There are no existing qualifications that make someone a business guru. The lists of people who have been accepted as business gurus have constantly changed over time. However, there are some people who have been accepted by a great majority as a business guru and also some organizations which have created their own lists of gurus. One English writer has described management gurus as "overwhelmingly a US phenomenon."