We are seeing an ever-expanding flight from reason in North America.  Both Donald Trump and "post-modernist" academics are part of it.  The current attack on biological gender reminds me of nothing so much as the traditional Christian rejection of sexuality, another biological fact, as sinful, preferring the social constructs of lifelong virginity or monogamous marriage.  

Anyone who believes in the "blank slate" concept of human nature - another denial of biological facts - should read Stephen Pinker's excellent book The Blank Slate.