It is higfhly possible that aliens that visit the earth do so to crossbreed potential candidates for ruling the earth,simliar to the illuminsti. It is very well suspected that the Illuminati is actually made up of cross bred alien technology.Historically, it refers specifically to the Bavarian Illuminati, an Enlightenment-era secret society founded on May 1, 1776. In modern times it is also used to refer to a purported conspiratorial organization which acts as a shadowy "power behind the throne", allegedly controlling world affairs through present day governments and corporations, usually as a modern incarnation or continuation of the Bavarian Illuminati. Aliens surely know that an outright invasion would notm  work, however a slow,financial takeover seems to be there blueprint.