The Landmarks of Tomorrow is a book by Peter Drucker which appeared in 1959. It describes a change in society which took place between 1937 and 1957, whereby the precepts of the Cartesian world-view no longer hold sway. Cause is no longer the central concept in understanding the world, but rather pattern, purpose and process. He described this as the post modern world.
- Chamberlain, John (1959). "Uncertain Landmarks". The Freeman (June 1959): 57–59.
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- Drucker, Peter (1959). The Landmarks of Tomorrow. New York: Harper & Brothers – via Internet Archive.