Thread:Wormulon/@comment-29927902-20161001144323/@comment-1073312-20161001180350

Class scale was Ghelæ's version of the tier scale before merged into mine. It is meant to clear up the ambiguity of some borders between different tier levels, some of which are distinctive in their own right, which have been classed as "revolutions". For example, an established Tier 4 insterstellar society that is beginning to industrialise on the scale of star systems could be seen as entering a 'megastructural revolution', while an established Tier 3 civilisation that can harness the output of stars would have the means to enter a 'hyperspatial revolution', which essentially is what Tier 2 is.

Might be worth checking out my extended tier scale linked from the page to view sci-fi factions and get the general idea.