As improvements on Epstein Drive Technology brings the Belt, Outer Planets, and more solar bodies into reach, there is a renaissance of exploration (and exploitation) of the vast number of resources available for the taking. Both heavily over-populated Earth and quickly growing Mars hire companies to fully... utilize everything possible. Soon, corporations are hiring individuals and even offering incentives to entire families to spend their entire lives on these new planetary bodies, working. These "Belters" are almost exclusively the working poor from Earth, happy to take a job anywhere as long as it means they get off basic assistance. Belter culture starts to grow as more and more people from all around Earth, Luna, and even Mars bond over spending most of their time in the vacuum of space, and the next to zero-G of the belt