One definition of critical is " a state in which a measurement suffers a definite change

Google that man, you don't need to use look for synonyms of critical, but that info should be in the defenition.

иσ σиє тяυℓу киσωѕ ιf нє ∂ιє∂, кαωαкι кιℓℓє∂ нιм ιи тнє мαиʝα тнσ

the book's theme is the moral ambiguity of the iranian revolution, history of middle eastern relations and the process of growing up during war. it sheds light on the stereotypical views of middle eastern culture and religion.

the author explicitly portrays the issues of class disparities and racism continously throught the whole novel.

the relationship between parents and childrens, the abandonment of faith, modernity vs fundamentalism and class conflict are the 4 main panels that this novel englobes.

hope this , if you would like me to be more specific about a specific excerpt let me know : )