The “firefighter,” Guy Montag never questioned the morality of his actions when he would do his book burnings, until he meet a young 19-year-old girl who helped him change his mindset completely. Throughout his rebellious and radical ideas and actions, Montag tried to revolutionize the world he knew.
Examples
There are several examples that support that Montag is a revolutionary in the book. In the beginning of part II: The Sieve in the Sand, he begins to think for himself while talking to his wife. He says to her, “Maybe the books can get us half out of the cave. They just might stop us from making the same insane mistakes! I don't hear those idiots in your parlor talking about it. Millie, don't you see?” (65).
He learns that there is a lot to be learned in the books of the world and reading them just might help to solve some of the worlds problems. Another example is when Montag visits Faber, an old ex-professor who collects books. Montag and Faber come up with a plan to revolutionize the world by planting books in the firefighters houses. With the help of the war, they may be able to convince other people to revolutionize. It is evident that they are serious with this plan when Montag ctually puts a book in one of the firefighter chief's house.
The final great example of him being a revolutionary is when he kills Captain Beaty, destroys the Mechanical Hound that attacked him, and escapes the city. After seeing his house burn and the fear that Faber will be caught, he is given the push to kill Beaty and destroy the Hound. This also kick starts his plan with Faber to plant books in the firefighters' houses.
Conclusion
It is obvious that Guy Montag was a revolutionary. He realized society wasn't right and planned to change it. Through revolutionaries like Montag and Faber, the future in Fahrenheit 451 looks promising.