The author was significant in the study of Sumerian history and language. This book was originally published in 1944, and revised in 1961. He lived much of his life in Philadelphia after his family fled Ukraine during the pogroms. Sumer is the oldest known civilization, located in Mesopotamia, and its language was not Semitic. It was eventually overthrown by the Akkadians, but elements of its mythology were influential on the region, producing, among other things, the first extant written version of the flood myth. The book discusses various cuneiform tablets and includes translations. One of these is the creation story, briefly mentioned in numerous other myths, in which everything emerges from the sea, and heaven and earth are divided, partially facilitated by the air god Enlil. That the sky is some sort of separation between the land and the heavens is one found in other mythology, as with Atlas holding up the heavens in the Greek, or Shu separating Geb and Nut in the Egyptian, as well as the firmament in Genesis. The sky is said to have been made of lapis lazuli. The origins of other aspects of civilization are also addressed, including cattle herding, agriculture, and the invention of the pickaxe and plow by Enlil. The gods Enlil and Ninlil (convenient when the names of a couple almost rhyme) give birth to the lunar god Nanna, who in turn fathers Utu, the solar deity. Enlil and Ninlil are also the parents of three gods of the underworld. Another story has the water god Enki create a city that he makes float on the water of the Persian Gulf, a pretty fascinating concept that might have influenced such concepts as the floating island of Delos and Aeolia in Greek mythology. The gods created humans out of clay in order for them to produce food. And there are three known versions of a story about a god slaying a monster in the sea, likely an earlier take on the Babylonian tale of Marduk and Tiamat, with the heroes of each being Enki, Ninurta, and Inanna.