Often I hear about the scenario of traveling back in time and various adaptation/survival questions related to that, but less often about people in the past traveling forward.
The basic scenario is you take people from the past and you move them forward in time to a more modern age. They can be from the 19th century, 17th, 15th, even older. Alternatively you take a large chunk of “modern” and drop it in the past. I don’t believe my faith in humanity is so damaged to say that every one of them goes crazy believing they’ve all died and gone to hell or something (or even a significant number of them) like I think people like to believe. For example- I don’t think your average person would go crazy being tossed 500 years into the future from now. I don’t believe we're actually smarter than most humans that have preceded us in history, we just know more. So that leaves the question:
How quickly would your average person or small group of people adapt to suddenly being exposed to a for-them-future time? Days? Years? Is this a loosely definable function based on the persons age vs how far they've gone?
Assume they’re mostly completely immersed in the “future,” assume that they're not immediately killed by disease, and assume that they’ve reached an "adapted state" where they can function as you would expect a normal member of society (even if they have decided not to do so for whatever reason). Comments on particular hurdles, and what may be thought of hurdles but actually are not are appreciated as well.