Good point. And different in different regions such as Texas vs NY. Upstate NY vs New York (the city). Even in the same cities within different cultural areas just blocks away from each other!
Now imagine there's only one cookbook left from the 20th century, and then "historians" of the year 3000 will proudly write a publication about "What North Americans Ate During the Middle-Ages (1600-2000)" based on that.
Survivor bias, well known fallacy that Historians are hardly familiar enough with.
Survivor bias, well known fallacy that Historians are hardly familiar enough with.