Partridge describes the 1947 Roswell incident as a key point in time within UFO spirituality, commenting: "Roswell is now firmly established as what might be described as a key ufological 'spiritual site' "; and James R. Lewis also calls attention to this event in his book "The Gods Have Landed", noting that it is seen by Ufologists as the date of the "emergence of UFOs into the public consciousness". Partridge places UFO religion within the context of theosophical esotericism, and asserts that it began to be associated as "UFO religion" after the 1947 incident at Roswell, New Mexico. According to Partridge, most UFO religions still have many of the key points associated with Theosophy, such as belief in the same Spiritual Hierarchy, and he also draws parallels to New Age thought. He notes that within the thought processes of UFO religions after 1947, many of these groups maintained beliefs that extraterrestrial beings were "heralds of a new era".