

Later, after the Conjoiners stepped in to help revive Chasm City, the Demarchists, unhappy with their new role as second fiddle, declared war on the Conjoiners a war which first went well as the Conjoiners, thanks to their hive-mind nature, became predictable on the battlefield. The height of Demarchist society, the Belle Époque, was only brought low by the Melding Plague, which pushed Chasm City, the main city of the Yellowstone Demarchy, into a dark age lasting forty years. Abstraction was used to simulate environments and co-ordinate servitors and other robots. They also utilised a sophisticated information network known as abstraction.

The pre-plague Demarchists - particularly the Yellowstone Demarchy - used to have expertise in nanotechnology, life-extension, and biological alterations, among other things. Notable members of House Sylveste include Dan Sylveste, who led the Resurgam expedition, and Calvin Sylveste, who was known for the Eighty. They were immensely wealthy, being the closest thing to royalty in the Yellowstone system. It later organized the archaeological expedition to Resurgam to research ancient Amarantin society. One of the most influential of these families was House Sylveste, which controlled Sylveste Institute for Shrouder Studies it also controlled the Sylveste Institute for Artificial Mentation before it was destroyed by Panoply during The Clockmaker incident. Until the time of the Melding Plague there were several powerful families within the Yellowstone Demarchy, such as the Voi family. Other known Demarchies included the Haven and Europan Demarchies - the latter appears to have risen and fallen multiple times - as well as Fand, Grand Teton and many other colonies in human-occupied space. Each core was tasked with collecting and processing votes, and also determining whether or not the elected decision was the best one in previous elections - voters who continually made "good" decisions were rewarded by having their vote count for more than one standard vote.

The voting process was run by "Polling Cores" in Demarchist cities and space stations. The Yellowstone Demarchy, which was the main Demarchy in human space for nearly two centuries, used such a technique. This constant prompting eventually faded away into the user's neural background, much like the ticking of a clock might fade away into background noise. The Demarchy functioned by means of a neural implant that constantly sought the user's opinion on aspects of Demarchist life. The Demarchists (pejoratively referred to by outsiders as zombies) were a faction of humanity who had a political system of democratic anarchy, or "Demarchy".
