I'll give you my theory on that. Back in the 1980s I used to study UFOs as deeply as I could. In that time frame I encountered documentation that was supposedly leaked from a Bilderburger conference that provided a roadmap toward a single government for the entire world. UFO lore indicated that UFO travelers are in contact with various governments; and, indicated that they would establish diplomatic relations with a single world government rather than 300 some-odd governments.
Now that we seem to be closing in on global governance, it is probably time to get people used to the idea that there is a Cosmic civilization to join.