What happened since the 60s in your opinion?

If I were to guess, it seems pubic policy in recent decades has often been founded on shaky ground. Anti-communism, anti-drug policy, various health/welfare policies, and so on are often not particularly evidence based. I can see this leading to a broader acceptance of dual-reality "facts" like we're seeing now. Words and truth lose meaning.

But is that new? I have no idea.