Awritten language is one component of what scholars call a

A written language is one component of what scholars called a CIVILIZATION.
Civilization refers to the stage of human social development which is considered as very advanced. There are eight major elements of civilization and they are: Art, culture, religion, technology, trade/transportation, government, economy and written language.

Basically create a schedule on what you need to study and stick with it

In financial aspects, a depression is a sustained, long haul downturn in monetary movement in one or more economies. it is a more extreme monetary downturn than a recession, which is a slowdown in financial action through the span of a typical business cycle. a depression is an irregular and extreme type of recession. so depression is always followed by recession but it is not correct to state that a depression always follow a recession.