Treating politics like a religion also makes it more emotionally volatile, more tribal (because differences of opinion become matters of good and evil) and more prone to outbreaks of moralizing and piety. “I was thinking about that Marx quote that religion is the opium of the people,” Elizabeth Oldfield, the former director of the Christian think tank Theos, told me. “I think what we’ve got now is [that] politics is the amphetamines of the people.”

How Social Justice Became a New Religion