If citizens do not bother to gain basic literacy in the issues that affect their lives,” Nichols wrote, “they abdicate control over those issues whet… - Michiko Kakutani

The assault on truth and reason that reached fever pitch during the first year of the Trump presidency had been incubating for years on the fringe right. Clinton haters... and Tea Party paranoids who claimed that environmentalists wanted to control the temperature of your home and the color of your cars... hooked up, during the 2016 campaign, with Breitbart bloggers and alt-right trolls. And with Trump's winning of the Republican nomination and the presidency, the extremist views of his most radical supporters—their racial and religious intolerance, their detestation of the government, and their embrace of conspiracy thinking and misinformation—went mainstream.

As Hannah Arendt wrote in her 1951 book, The Origins of Totalitarianism, “The ideal subject of totalitarian rule is not the convinced Nazi or the convinced Communist, but people for whom the distinction between fact and fiction (i.e., the reality of experience) and the distinction between true and false (i.e., the standards of thought) no longer exist.

Because social media sites give us information that tends to confirm our view of the world — what Pariser calls “an endless you-loop” — people live in increasingly narrow content silos and correspondingly smaller walled gardens of thought.