Pacifism

Pacifism was the term used to describe the beliefs of anyone who opposed wars and the use of violence. Anyone who took this choice of life was known as a pacifist.

Herrick branded Orfe a pacifist as he had no wish to take up arms against the Time Lords. (DW: Underworld)

During the Human-Hath War on Messaline, there was an outbreak of pacifism among the humans in the Eastern Zone, three generations before the Tenth Doctor's arrival. (DW: The Doctor's Daughter)

Races

 * Marinusians, until the Voord forced them to fight. (DW: The Keys of Marinus)
 * Dulcians, after they outlawed wars. (DW: The Dominators)
 * Thals, after the Thousand Year War. (DW: The Daleks)
 * Cybermen, after becoming Cyberlords. (PDA: Synthespians™)
 * The Telphin, after it was "banished from their culture". (DWM: Memorial)

Individuals

 * The Doctor, although in his earlier incarnations he didn't show a hatred for the use of weapons. (TVC: Master of Spiders)
 * Sarah Jane Smith often expressed her dislike for violence. (SJA: Invasion of the Bane) (DW: The Stolen Earth)