2014’s Cibola Burn is the fourth volume in James S. A. Corey’s Expanse series1.
The Ring Builder’s protomolecule creates death and damage — just ask the unfortunates on Eros — but it also grants opportunities. Humanity has lost one major asteroid city; it has been forced to share the solar system with a vast, powerful alien artifact that regards humans as potentially useful raw materials. On the plus side, thanks to the protomolecule humanity now has access to the Ring Builder wormhole network and a thousand life-bearing worlds.
With potential living space expanded a thousandfold, one might expect it would take centuries before groups began squabbling over territory. Ha ha. It takes about a year.