Homecoming Saga

Though it does not prevent them from doing evil, it keeps their societal capability for destruction limited by suppressing any thoughts that might lead to things like long-distance travel or instant communication.

Thus the technology on Harmony includes basic computers and solar-powered handheld energy weapons, but no cars or even wagons.

Soon after, the people begin to receive dreams similar to those that the Oversoul sends that come directly from the Keeper of Earth via faster-than-light transmission.

The fourth book, Earthfall, concerns itself with the journey of one of the ships back to Earth and the culture clash that results upon its homecoming, specifically, establishing a settlement and reconciling human culture with the existing creatures that have risen on Earth in the intervening millennia.

The final volume, Earthborn, takes place five centuries further in the future; the one remaining member of the original expedition seeks to alter the path of the changing culture and see the Oversoul's mission finally fulfilled.