I have not read his book.
But presuming the point is that the Western world's incidence of violence has declined dramatically, as our societies interconnect and provide employement, I would have to agree [and from a prophetic standpoint, exactly what I've been looking to substantiate].
The 'marauding bandit' has been effectively put out of business.
IMO, this is the period of 'peace' where the 'chain' of God's word is removed and replaced with humanism.
The foretold 'great falling away' so obviously happening within Christianity now.
(the post's title is 'Steve' Pinker ;)