Horowitz will speak at 7 p.m. today in Memorial Hall. The speech, which is sponsored by the College Republicans, is free and open to the public.
Horowitz has criticized recent teach-ins at UNC and the University of California-Berkeley, calling them critical of the war and anti-American.
"My greatest concern is the lack of academic freedom for anyone who disagrees with the left," Horowitz said in a phone interview with The Daily Tar Heel on Tuesday. "In order to get a good education you have to have discussion of both sides of an issue."
Senior Rheta Burton, president of the College Republicans, said the group chose to bring Horowitz to campus because of his "unique" political history.
"This isn't just some guy spouting the regular anti-war rhetoric," she said. "He's been in both the pro- and anti-war movement. He's a unique individual."
Horowitz emerged as a leader of the New Left radicals while studying at Columbia University and UC-Berkeley in the late 1950s and early 1960s.
During his leftist days, Horowitz edited the New Left magazine Ramparts and maintained close ties with Black Panther Party leader Huey Newton.
Horowitz's political orientation shifted from left-wing liberal to staunch conservative in the early 1980s.
Given Horowitz's complex political past, Burton said, the College Republicans hope his speech will provide students with a more balanced perspective on the nation's war on terrorism.