Irving Louis Horowitz (September 25, 1929 – March 21, 2012)
was an American sociologist, author and college professor who wrote and lectured extensively in his field.
Horowitz was born in New York City on September 25, 1929, to Louis and Esther Tepper Horowitz. He was educated at City College of New York (now City College of the City University of New York, or CUNY), B.S., 1951; Columbia University, New York City, M.A., 1952; and the University of Buenos Aires, Argentina, Ph.D., 1957.
In 1973 Horowitz was one of the signers of the Humanist Manifesto II.
In 1951, he married Ruth Narowlansky, with whom he had two children, Carl and David; they were divorced in 1964. He married Danielle Salti in 1964; the couple was divorced in 1978. He married Mary Ellen Curtis in 1979. He died on March 21, 2012.