"Revolutionary fervor" refers to an intense passion and excitement within a group of people who strongly believe in and are dedicated to bringing about significant and often radical change in society or government. Full definition
We all have had the experience of persons imbued with revolutionary fervor in their youth who become cynical opportunists in their maturity. (firstthings.com)
Miller (Capote) directs with intelligence, though not flair, but the script makes up for any flagging energy with crackling Sorkin dialogue and performances that sing with revolutionary fervor. (film.avclub.com)
Russian women, despite their former revolutionary fervor, typically receive flowers and chocolates from their significant others, having traded Soviet war songs for romantic dinners in the latter part of the twentieth century. (fortune.com)