Is penal substitutionary atonement 'knocked out'?

Earlier this month, pastor and bestselling author John Mark Comer posted that a new book was a “knockout blow” to Penal Substitutionary Atonement or, as theology nerds would say it, “PSA.”

I asked Thaddeus Williams, assistant professor of Systematic Theology at Biola University to weigh in on this historic Christian doctrine that is proclaimed throughout Scripture and was championed by several Church fathers, writes John Stonestreet, president of the Colson Centre for Christian Worldview.

Here’s Dr. Williams: