T The Enlightenment had a good run. Over 400 years ago, an audacious idea emerged among scientists and philosophers that a single shared reality existed that could be measured and predicted using fundamental laws of nature. All the trappings of modern life, every technological convenience and scientific breakthrough flowed from the radical realization that truth exists — not in the proclamations of the powerful, but in underlying nature itself.

The re-election of Donald Trump is a harbinger that the Enlightenment may now be on its last legs. Bored and weary of having to accommodate facts we don’t agree with, many are retreating into bespoke realities served up by social media algorithms. Our ubiquitous devices and online platforms — themselves a product of Enlightenment thought — are ironically becoming its undoing.

Embracing a shared evidence-based reality is hard work. It requires dialogue and compromise among people who disagree and respecting the rights of those we might not respect. Many people seem sick of it. Popular cyber-platforms paired with artificial intelligence provide a convenient off-ramp from a confusing and frightening world that increasingly requires our attention and agency.

Historian and author Yuval Noah Harari notes that “most information is not truth.” Our social media feeds are a firehose of addictive and largely useless images and videos, curated by online algorithms designed not to inform but to keep us engaged.

These information streams are also increasingly polluted with AI-assisted disinformation in an effective effort to weaponize ignorance and undermine the very concept of truth. Why? Because disinformation works. In the words of Holocaust historian Timothy Snyder, “post-truth is pre-fascism.... To abandon facts is to abandon freedom.”.