Steven Pinker

People living in a settlement walk about, as the skyline of Manila's financial district is seen in the background, on August 17, 2017. The Philippine economy grew by 6.5 percent in the three months to June, likely one of the fastest in Asia, the government said on August 17, defying concerns over President Rodrigo Duterte's unconventional leadership. (Noel Celis/AFP/Getty Images)

Steven Pinker: The world is getting better, not worse. Seriously.

But in his new book Enlightenment Now, Pinker warns authoritarian populism on the right, and repressiveness on the left, could thwart progress