Are We Less Violent Than We Used To Be?

Stephen Pinker has written an excellent book, The Better Angels of our Nature, in which he refutes the general belief that humanity has never been more violent.  David Runciman of The Guardian has written a review of this book.  This blogger has had the privilege of listening to several interviews of Dr. Pinker regarding his recent book.  The main conclusion of this in-depth analysis of the subject is that the Enlightenment and reason has led to an exponential drop in violence.  Will Dinesh D'Souza, and other Christian apologists, change their views on the history of violence when confronted with actual data?  Has there EVER been an apologist who retracted an opinion based on evidence refuting such?  Not in this blogger's experience.