I think the way men represent to themselves the future ( I mean here what is about to arrive within a period of say, half a century) is part of their present. The anticipations ( positive or negative) of the next historical period are , somewhat, part of a given historical period.
( In the same way as our anticipations about what we are about to see are part of what we see while discovering a city for example, which explains that a city never has the same charm as the first time we saw it; in the same way as our anticipations about what our life was going to be were part of our youth , and made this youth so beautiful).
Has a history of these anticipations ever been written? I mean a history of the alledged " trends" and " tendencies" men thought ( often misleadingly) were operating " in the depth" during the period they were presently living?
Note : I'm not thinking specially of anticipations regarding technology; rather of anticipations regarding politics, religion, society.