Smuta

Smuta or "смута" is a period of turmoil after each modern. The smuta happens because the old sources of non-renewable resources that were used for fast modernization and consolidation of power are depleted, if the science progress is slowed down (because most of the tech of the current уклад is already invented) and the new sources of non-renewable resources are not discovered yet.

It seems that usually the smuta takes around 30 years (two generations) to resolve.

The harshness of the smuta depends of the amount of space left. If there is not much - it's horrible war of everyone against everyone.

Usually there are some space left in forms of "неудобий" (uncomfortable to develop places, UDP) that were not used much for development during the moderns because of some stopping factors.

Then the smuta is happening along the "распашка неудобий" (development of UDP) - people actively trying to finally develop the UDP despite the stopping factors by overcoming them.

In the current smuta (2020-2050) the key UDPs are:

Ukraine
Russia
Belarus
Kazakhstan