I read a series of novels in the 1990s-2000s where a world was colonized from Earth by slower than light travel. Eventually, FTL travel was invented and the world changed dramatically (I remember there were camps where living conditions were poor). I seem to remember that there was sabotage of a ring that was being constructed that would have led to even more migration. I’ve been looking for the series for years. Can anyone point me in the right direction?
This sounds like the Coyote Series by Allen Steele. The first colonists are political refugees from North America they travel using cyrostasis in a slower than light vessel. The second group is a government funded expedition using a FTL dilation drive of some kind, different government to that fled by group one (I think they're from Latin America) but they treat both the "natives" and their own new colonists poorly and are ousted. The ring is for instantaneous travel between Coyote and Earth and is initially resisted by the population on Coyote, it does get built eventually under treaty with a third government group from Europe. There are three or four books set on Coyote and several other novels set in the same universe.