Why do you think some societies adopted agriculture while others did not? why do you think some agricultural societies did not develop into advanced civilizations?

Agriculture is heavily dependent on how suitable the land that the society lives around is, some societies tried to adopt agriculture but were built around such unsuitable (dry/non-fertile soil) that crops couldn't grow. Even societies that were sucsessful in agriculture may have not developed into advanced civilizations because of a million diffrent reasons, they may have faced a drought, war, disease or any other hardship that could hold them back.

They followed strict caste rules while interacting with people of other castes. 
They believed that their present life was the result of their past karma. 
They considered people of other castes to be superior or inferior to themselves.

Hope this helps!