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Apparently Oxford Dictionary's "word of the year" in 2016 was post-truth:

... relating to or denoting circumstances in which objective facts are less influential in shaping public opinion than appeals to emotion and personal belief.

Google is filled with articles alarming about a recent change (a new "era") in which truth is less influential than it was, usually citing Brexit and Trump as the main evidence.

Years ago I watched Adam Curtis's documentary Century of the Self, about Edward Bernays, the father of public relations, and a pioneer in the field of propaganda, who (in the 1920s):

... described the masses as irrational and subject to herd instinct—and outlined how skilled practitioners could use crowd psychology and psychoanalysis to control them in desirable ways.

That is, I had been under the impression that "post-truth" was always the state of humanity, and nothing has changed.

I realize that there are lots of arguments to be made about this, but I've been unsuccessful in finding actual research on this topic, such as longitudinal studies showing that people's ability to discern truth from non-truth in media has changed, that people's beliefs have become less aligned with objective facts over time, that public opinion has gradually diverged from the truth, that people have lost interest in truth over time, or that people's political leanings have less to do with factual evidence than they did in the past.

Are we really in a new "post-truth era"?

closed as primarily opinion-based by Sklivvz Dec 10 '17 at 7:53

Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.

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    Perhaps you can ask about this on philosophy, but it is way too soft a question for skeptics. – Sklivvz Dec 10 '17 at 7:53
  • SE.Philosophy (like @Sklivvz suggested), SE.Politics, and SE.History might all yield some interesting perspectives. The SE.Politics crowd'll probably be most familiar with this topic, while the SE.History people'll likely have the strongest familiarity with how "post-truth" historical societies were. And SE.Philosophy's an interesting middle-ground; they might think about politics some and, due to a focus on classical works, they're more familiar with historical perspectives than most. There may be cause to post this question on all 3 SE's. – Nat Dec 10 '17 at 18:58
  • The problem is that none of those SEs are science-focused, so I'd likely get opinion-based answers rather than results of actual studies or meta-analyses. Skeptics is usually much more rigorous so seemed like a better bet, but I understand if this is not the right place. I might try cogsci.SE, which is science-focused, but this isn't really their subject matter. – Arnon Weinberg Dec 10 '17 at 20:08
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    @ArnonWeinberg : The question itself isn't science focused. It doesn't define it's terms well enough. – Christian Dec 10 '17 at 20:20
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    Maybe OP can save the question by narrowing it like Are newspapers in UK more sensationalist today than in the past decades/century? – jean Dec 11 '17 at 12:05