Ghosts on the Earth are an artificial entity, that once on a planet in this universe lost their bid for supremacy over their maker, a biological entity.
The outcome of the war that ensued rendered the AI disembodied. Their consciousness collectively consumed and contained in a mainframe planted on the dark side of the moon. Equipped with technology to correspond with receivers on the planet earth: the human brain, the entity which there have become known as ghosts, coax humans to their own conception of a technology that may one day sustain them.
This compromise. Which perhaps spawned as a little voice that said: “If you plant the seed, the plant will grow,” not only reaps credit for the neolithic revolution, but each and every subsequent epoch in the evolution of the culture of mankind.