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Many of these methods were developed between the 1940s and 1970s, often in the USA and often in affiliation with defence-related analyses or strategic intelligence in large firms.
A social history of telephone to 1940. Berkeley, CA: University of California Press. Fleck, L. 1979.
Since the 1940s, the way people and organizations have looked at the future has changed from a technology-oriented attempt to predict the future toward a more exploratory perspective that incorporates many different societal aspects (e g.
It differs from an earlier mission-led period (1940s and 1950s) that was focused more nationally
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