Is Professor Stephen Jay Greenblatt Jewish?

Yes, Professor Stephen Jay Greenblatt is a Jew.

According to Wikipedia: "Greenblatt self-identifies as an Eastern European Jew, an Ashkenazi, and a Litvak. His observant Jewish grandparents were born in Lithuania; his paternal grandparents were from Kovno and his maternal grandparents were from Vilna. Greenblatt's grandparents immigrated to the United States during the early 1890s in order to escape a Czarist Russification plan to conscript young Jewish men into the Russian army."

Greenblatt's article in the New Yorker discusses "The Invention of Sex" from the perspective of the insights of the theologian Augustine of the 4th century AD - who was not Jewish, rather he was Manichean first and later, a rather well-known Christian. 

See:How St. Augustine Invented Sex - He rescued Adam and Eve from obscurity, devised the doctrine of original sin—and the rest is sexual history.

This I presume, is a selection from Greenblatt's new book which will deal with Adan and Eve narratives in Genesis and the ideas of original sin and so on.

From Amazon: The Rise and Fall of Adam and Eve explores the enduring story of humanity’s first parents. Comprising only a few ancient verses, the story of Adam and Eve has served as a mirror in which we seem to glimpse the whole, long history of our fears and desires, as both a hymn to human responsibility and a dark fable about human wretchedness.

The biblical origin story, Greenblatt argues, is a model for what the humanities still have to offer: not the scientific nature of things, but rather a deep encounter with problems that have gripped our species for as long as we can recall and that continue to fascinate and trouble us today.

And my books from Amazon may be reached by clicking on the below image.