Post-truth politics isn’t a coherent description of the world but a cry of despair. Propositions have not stopped being right or wrong just because of the invention of Facebook. Whatever the authoritarian cults who rage across Twitter say to the contrary, the Earth still goes round the sun and two plus two still equals four.
Donald Trump, Boris Johnson and other liars have made fantastical promises to their electorates. They said they could build a wall and make Mexico pay for it or make Britain richer by crashing her out of the EU.
But instead of laughing at their transparent falsehoods or being insulted at being taken for fools, blocs of voters have handed them victory. Evidence could not shake them. Common sense could not reach them. Surely, their gullibility shows we have arrived in a new dystopia. You can see why they got that way. Trump is clear that the checks and balances that restrained power in the old world will not apply to him. His refusal to release his tax returns shows it. The Russian dissident Garry Kasparov put the urgent case for transparency best when he said “Trump has criticised Republicans, Democrats, the pope, the CIA, FBI, Nato, Meryl Streep… everyone and anyone “except Vladimir Putin”.