Future Shock is a book written by the futurist Alvin Toffler in 1970. In the book, Toffler defines the term "future shock" as a certain psychological state of individuals and entire societies. His shortest definition for the term is a personal perception of "too much change in too short a period of time". The book, which became an international bestseller, grew out of an article "The Future as a Way of Life" in Horizon magazine, Summer 1965 issue.