Going to assume that your use of "briefly" there is preceding your attempt at a short synopsis, rather than that your views have shifted again.

Personally I'm depressingly cynical when it comes to Pinker's views, looking at, e.g., https://twitter.com/robinhanson/status/1496685550241292293 and then thinking about how now, given modern weaponry one man's decision could basically destroy all life on earth. A few billion dead in a single conflict would be all it'd take to really mess up Pinker's trend line.