Pamphleteer (noun)

1. A person who writes, publishes, or distributes pamphlets.
2. A person who advocates for a particular cause or viewpoint through pamphlets.

Origin:

From french pamphletier, from pamphlet ("a small book or brochure"), from latin pamphilus ("lover of all"), from greek πάμφιλος (pamphilos, "loving all, universal"), from πᾶν (pan, "all") + φίλος (philos, "lovin.g")

Examples:

1. He was a pamphleteer for the rights of the working class.
2. The pamphleteer's writings were widely distributed and read.
3. The pamphleteer's arguments were often controversial and sparked much debate.
4. During the 18th century, many pamphleteers used their writings to criticize the government and call for political reform.
5. The pamphleteer's literature was instrumental in the spread of new ideas and movements.