It doesn't mean to trample our cities and topple their gleaming spires; it acts on pure instinct to find food, shelter and a place to breed _ visceral drives that most people can relate to.
2.
The New York Times Book Review said in January 1990, " and in that respect, it surpasses even ` The Double Helix'by James Watson in its examination of the most visceral drives of a great scientist ."