Professor Michael A. Bellesiles on the history of gun culture in America. His new book, “Arming America: The Origins of a National Gun Culture” (Knopf) looks at our country’s obsession with guns. Historically, he says it began around the civil war. Before that, there was virtually no access to firearms. His research refutes the conventional lore that Colonial families were armed, and that the gun was the symbol of the frontier. Bellesiles is a Colonial historian at Emory University, and the Director of Emory’s Center for the Study of Violence.