If we ask ourselves how it is that the advocacy of gay marriage has become an orthodoxy to which all our political leaders subscribe, we must surely acknowledge that intimidation has some part to play in the matter. Express the slightest hesitation on this score and someone will accuse you of “homophobia”, while others will organise to ensure that, even if nothing else is known about your views, this at least will be notorious. Only someone with nothing to lose can venture to discuss the issue with the measure of circumspection that it invites, and politicians do not figure among the class of people with nothing to lose.

Yet it is unlikely that the ordinary conscience will find itself entirely at ease with a change