Answer:
We have difficulty understanding the ideas of the past because today we are an evolved society with a lot of access to information, which makes our knowledge wider than the knowledge of past society. For this reason, ideas from the past may seem archaic and unreasonable when compared to our current thinking.
Primary resources do not show a complete picture of the reason people in the past had these "archaic" thoughts, it just shows what those thoughts were and at what point in history they occurred
Step-by-step explanation: