Clason started two companies, the Clason Map Company of Denver, Colorado and the Clason Publishing Company. The Clason Map Company was the first to publish a
road atlas of the United States and
Canada, but did not survive the
Great Depression. Clason is best known for writing a series of informational pamphlets about being thrifty and how to achieve financial success. He started writing the pamphlets in 1926, using parables that were set in ancient
Babylon. Banks and insurance companies began to distribute the parables, and the most famous ones were compiled into the book
The Richest Man in Babylon - The Success Secrets of the Ancients. He is credited with coining the phrase, "Pay yourself first". ==Personal life==