Pacifism

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

Races

 * Dulcians, after they outlawed wars.
 * Thals, after the Thousand Year War Thals became pacifists.

Individuals

 * The Doctor, although in his earlier incarnations he didn't show a hate for the use of weapons.