They claim to be a physically weakened race who merely need to join their DNA with more integral human DNA to survive, that they are refugees from a dying planet who need the help of sympathetic earthlings. If these explanations don't succeed in appeasing the humanitarians in government, the humanistic approach, popular within the New Age and Human Potential movement, is likely to be persuasive. Aliens, walk-ins, ascended masters, spirit guides, channelled beings and natural forces like Gaia, all are imparting a similar message of impending disaster and a need for the humanity to unite. The extraterrestrials are feigning good intentions by warning humans of their potential fate, and the offer to assist humans is all but altruistic in that it is designed to unite mankind under their authority, according to plan. Extraterrestrials have a plausible explanation as to why, against the odds, they evolved to look humanoid, why they would take such an interest in helping humankind, and why the government should support their plan to live in underground military bases for now, conducting secret experiments and gradually getting the public used to the idea of aliens, so as not to cause mass panic and hysterical backlash.
Extraterrestrials claim to be the ancient progenitors of the human race.
Extraterrestrials have had thousands, even millions of years to implement their deception. It was necessary, the extraterrestrials maintain, to educate humans through various techniques that have been given to the spiritual leaders of human history. Humans needed to develop a greater capacity for spiritual understanding before they could receive total enlightenment. The spiritual evolution of mankind has been guided since the beginning by nonhuman intelligences whose agenda has been to infiltrate, and even instigate, religious traditions in all cultures. Legends of cultures ranging from Babylonian to Hindu to Native American are laden with beings who possess superior technology, who are spiritual beings enjoying worship and reverence in exchange for distributing wisdom.