Rearranging the setting.

[Astromancer]

Cheaper escape from Earth's gravity and thus vastly more people off planet could be fun. Or simply a strong memeplex for leaving the solar system as a means of escaping cultural collapse.

I could see a group using memetics to push humanity off the Earth in order to save the natural environment. Perhaps even the insult comic dolphin could be in on the plot simply to be rid of humans on Earth.