Its called a caste. Caste is a lifelong social group into which an individual is born
There were various reasons for the start of WWI starting with the assassination of Archduke Franz Ferdinand. That assassination was the “breaking point,” if you will. Other underlying reasons include tension created due to the formation of alliances within European nations and conflict due to the rise of imperialism.
A: a form or system of rule
It is true, because age and occupation can determine how high or low of a risk they could be.