english: Peter Drucker was a professor of philosophy before becoming involved in business, and this is what Peter Drucker says: "Planning is actually incompatible with an entrepreneurial society and economy."
non_english: Peter Drucker je bil profesor filozofije, preden je stopil v poslovni svet. In Peter Drucker je dejal: »Načrtovanje je nezdružljivo s podjetniško družbo in ekonomijo.«