Critical analysis is a detailed and complex process that can not be done in the eNotes format or in accordance to eNotes objectives. However, what critical analysis entails is an examination and analysis of both the literary elements and the literary techniques (the non-optional and the optional literary devices) employed in a work.
Aeropagitica is a prose work that addresses England's Licensing Order of 1643. Milton is opposed to the law that suppresses (censures) books prior to printing. Milton predominantly uses Classical allusions to both Greeks and Romans to persuade England's parliament that the Licensing Order would be folly. He also uses Biblical allusions though these are employed to a slightly lesser degree in order to flatter Parliament by suggesting they compare to the Greek and Roman Senators.