Mad Cults & Minority Beliefs.
I wonder how interested we should be in those murderous cults of the postwar era that led their devotees to commit mass suicide. It is such a bizarre extreme that interest seems somewhat ghoulish. Dutch tulip-mania was odd. Christianity is odd, and in some forms very odd. But these cults strike me as impossible to understand.
I am thinking of the seventies cult of "the jungle poisoner", Jim Jones of Jonestown, and his "Peoples Temple" cult that culminated in 1978 with 'revolutionary suicide' in the Guyanan jungle. And of David Koresh's "Branch Davidian" cult that ended (in 1993) in the Mount Carmel siege near Waco (Texas). The third example that comes to mind is less well known in the Anglophone world; it climaxed in French-speaking Switzerland in the nineties. I looked it up on Wikipedia –– 'L' Ordre du Temple Solaire'.
"The Order of the Solar Temple (French: Ordre du Temple solaire, OTS), or simply the Solar Temple, was a French-speaking religious group, often described as a cult, notorious for the mass deaths of many of its members in several mass murders and suicides throughout the 1990s. The OTS was a neo-Templar movement, claiming to be a continuation of the Knights Templar, and incorporated a mix of Rosicrucianism, Theosophy, and New Age ideas. It was led by Joseph Di Mambro, with Luc Jouret as a spokesman and second in command. It was founded in 1984, in Geneva, Switzerland."