What were the characteristics of the american work force in the early 1800s?

Why is it useful for historians to base certain studies on the analysis of historical themes

Which of the following scenarios illustrates the cultural impact of expanded regional trade for postclassical civilizations? o a. the byzantine empire rises in place of the roman empire. o b. an islamic scholar attends a university in his hometown. o c. internal disputes weaken a large african empire. o d. an arabian sultan wears a robe made from chinese silk.

Explain how social darwinism impact imperialism.