How Ranks Work

Due to how in the future, or the era of chosen ones people have less strength more often than not, or rather less people get near the peak strength of those in the past, using genin, chunin, jonin and kage classifications would be unfair, as larger numbers of people are kage level, or jonin, so to change how these are classified, classifications will be tier 1-4

Tier 1 : This is similar to genin and chunin 'levels' stronger civilians are at this rank although that is only the minority of strong civilians, it is also similar to how foot soldiers would be as ninja are not a thing, only military and mercenary. Dispendible, Canon fodder.

Tier 2 : This is similar to special jounin, jounin and low end / weak kage, in other words generals would be like this and lower ranked people, this world doesn't have the same military system so don't expect them to be included here, soldiers can more often be at this point when close to being generals, or halfway there strength wise.

Tier 3 : This is similar to kage and a bit above the strongest kage levels, think jiraiya sage mode to be somewhere near the peak of this

Tier 4 : This is naruto and sasugay when they defeat kaguya, I don't really understand their boruto levels since I don't watch it.

Anything above this is likely to be Ootsutsuki and I assume boruto levels of naruto and sasugay.

The only reason the world isn't more advanced, is war and the fact that genius intelligence is less likely when it comes to buildings, lifestyle etcetera, afterall there are still around 800 years for my plan of when naruto will be born, even for fast growing species, war holds them back so much, think of gurren lagann.