Talks
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CIVIL DISCUSSION Major John Mountcastle presents “Guerilla Warfare in the Civil War” as part of the Civil War Roundtable of New York’s monthly meeting. The Roundtable has been meeting since 1951. Tonight, 5:30 p.m., New York Helmsley Hotel, 212 E. 42nd St. at Third Avenue, 718-341-9811, $35 general, $25 members.
JOHN BROWN’S BODY Historian David Reynolds discusses the life and legacy of abolitionist John Brown. In his book “John Brown, Abolitionist: The Man Who Killed Slavery, Sparked the Civil War, and Seeded Civil Rights” (Knopf), Mr. Reynolds argues that Brown was a was a principled radical rather than an irrational crusader. Tonight, 6 p.m., CUNY Graduate Center, 365 Fifth Ave. at 34th Street, 212-817-8215, free.
VIEW FROM SPACE Physicist Joel Primack and science philosopher Nancy Ellen Abrams will discuss their book “The View From the Center of the Universe: Discovering Our Extraordinary Place in the Cosmos” (Riverhead Hardcover). Their presentation will offer a new view of the universe with astronomical videos and supercomputer simulations. Tomorrow, 7:30 p.m., Columbia University Observatory, Pupin Hall, 550 W. 120th St., between Broadway and Amsterdam avenues, 212-854-1976, free.