At the end of last month a three-day workshop was held in the Vatican on the sombre topic of “Biological Extinction”. The event was jointly sponsored by the Pontifical Academy of Sciences and the Pontifical Academy of Social Sciences, and reflected Pope Francis’s curious personal penchant for environmental alarmism.

Among the participants was the notorious population control enthusiast Paul Ehrlich, who had predicted in 1968 that hundreds of millions would starve to death in the 1970s and that England might well not make it to the millennium. Ehrlich has not been much chastened by the failure of his prophecies. Nor is he a friend of the Catholic Church. In a book published as recently as 2014, he describes “the Pope and many of the bishops” as “one of the truly evil, regressive forces on the planet”. Ehrlich is also well known for his support over the years for mass sterilisation, contraception and abortion.