I'm writing a paper on the history and the origin of Time and I'm finding it impossible to locate any meaningful material on how the concepts colloquially referred to as "the past" and "the future" originated and then were transmuted from being a category sets of events - to places that now exist elsewhere.
For example, the set of all events that occurred before some moment in time were categorized as "the past", and the set of events that will occur after some moment in time were categorized as "the future".
Thus the past and future are an abstract collection of events. However, how and when did that change and humanity started thinking of "the past" and "the future" as being places that we physically travel from and to at a rate of one second per second?
No pun intended, but what are the histories of "the past" and "the future" as concepts and how did they evolve?