Why we build walls and how we use them

SALISBURY — Historian David Frye will discuss his new book, “Walls: A History of Civilization in Blood and Brick,” at Noble Horizons on Saturday, March 30, at  11 a.m.

Frye, who teaches ancient and medieval history at Eastern Connecticut State University, said in a phone interview Friday, March 15, that the book goes back to the first “historically affirmed” example of a border wall, built in ancient Sumeria about 4,000 years ago.

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