Caesar Augustus revivied Romes strength and wealth and created the position of emperor making Rome officially an empire. Julius Caesar's adopted son made emperors after the Republic more despotic. Rome however still experienced peace through what is called the pax Romana or roman peace. Its economic and military increased. For 200 years the empire remained great vigor amd began military expanison.
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Well the modern study of hsitory helps us not make the same mistakes as we did in earlier history.
Answer: "a person who studies human history and prehistory through the excavation of sites and the analysis of artifacts and other physical remains."