Theme is a synonym of Topic. Topic is related to Main. Main is related to Common. Common is the opposite of Distinguish. 
you would Learn because Stupid. Learn is related to Understanding. Understanding is related to Agreement. Agreement is related to Peace. 
Theme <--Synonym--> Topic <--RelatedTo--> Main <--RelatedTo--> Common <--Antonym--> Distinguish 
Stupid <--MotivatedByGoal-- Learn <--RelatedTo--> Understanding <--RelatedTo--> Agreement <--RelatedTo--> Peace 