Not everyone who came to be associated with the New Age phenomenon openly embraced the term "New Age", although it was popularised in books like David Spangler's 1977 work "Revelation: The Birth of a New Age" and Mark Satin's 1979 book "New Age Politics: Healing Self and Society". Marilyn Ferguson's 1982 book "The Aquarian Conspiracy" has also been regarded as a landmark work in the development of the New Age, promoting the idea that a new era was emerging. Other terms that were employed synonymously with "New Age" in this milieu included "Green", "Holistic", "Alternative", and "Spiritual".