A futurist, evolutionary biologist, and Catholic priest married with Vatican approval, Robert Francoeur has dedicated many years of study to "the many ways in which the watershed social changes of the twentieth century have and will continue to change our views of human sexuality," including the ways in which women and men bond and build families. His latest books are Sexuality in America and a multi-volume International Encyclopedia of Sexuality. Read an excerpt from "The Religious Supression of Eros"

Frances Kissling directed one of the first family planning clinics to provide legal abortions in the United States in the 1970s. In 1982, she became the director of Catholics for a Free Choice (CFFC) and today resides as president of the organization. Located in Washington, DC, CFFC has sister organizations in ten Latin American countries and a network extending throughout Europe, where CFFC is affiliated with the European Catholic Network. Kissling is coauthor of the book Rosie: The Investigation of a Wrongful Death, the story of the first death from illegal abortion traceable to the 1977 cutoff of US government funding for abortion for low income women. Read an excerpt from "Mary Co-Opted as Co-Redeemer"

Thomas Moore is a writer and lecturer and lives in New England with his wife and two children. He was a monk in a Catholic religious order for twelve years and has degrees in theology, musicology, and philosophy. A former professor of religion and psychology, he is the author of Care of the Soul, Soul Mates, The Re-Enchantment of Everyday Life, Meditations, and The Soul of Sex. Read an excerpt from The Soul of Sex: Cultivating Life as an Act of Love

Elaine Pagels is the Harrington Speare Paine Professor of Religion at Princeton University, and the author of Adam, Eve and the Serpent, The Gnostic Gospels, and The Origin of Satan. Read an excerpt from Adam, Eve, and the Serpent

Camille Paglia is Professor of Humanities at the University of the Arts in Philadelphia, a weekly columnist for Salon, and the author of Sexual Personae: Art and Decadence from Nefertiti to Emily Dickinson; Sex, Art and American Culture; Vamps and Tramps; and her latest, The Birds, a study of Alfred Hitchcock's film for the British Film Institute's Film Classics Series. Read an excerpt from Vamps and Tramps