In one to two, write the “big idea” or main point of thinking like a historian?

Posting again:

Historians work to methodically dissect the past to help us understand the present and avoid making similar mistakes in the future.

The base job of a Historian is to break down a historical events into parts to understand how the historical event or historical arc could have occurred as it did. This could range from "Why did the Japanese bomb Pearl Harbor" to "Why did the Union win the Civil War"

Each question has answers that can help future generations understand the implications of their actions.

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.

chemicals that are toxic to plants