Final answer:
Historians can study historical figures without a library by utilizing a variety of other sources, such as archaeological findings, oral histories, and digital archives, and by using approaches like examining social history from "the bottom up".
Step-by-step explanation:
Historians are adept at piecing together the lives of historical figures even in the absence of a traditional library setting. They do so by utilizing a variety of sources beyond just written records; these can include archaeological artifacts, oral histories, material culture like objects and buildings, and digital archives. Historians also scrutinize court proceedings, church records, and letters to uncover the lives of those less documented, such as women, the poor, and minorities. The approach to study history from "the bottom up", which gained prominence in the 1960s, has significantly contributed to this more inclusive and detailed understanding of the past.