Theodore Dalrymple, a conservative English journalist, has written that "the worst brutality I ever saw was that committed by Sendero Luminoso (Shining Path) in Peru, in the days when it seemed possible that it might come to power. If it had, I think its massacres would have dwarfed those of the Khmer Rouge. As a doctor, I am accustomed to unpleasant sights, but nothing prepared me for what I saw in Ayacucho, where Sendero first developed under the sway of a professor of philosophy, Abimael Guzmán."