For his book “The Sultan and the Queen,” Jerry Brotton has uncovered a history that goes against everything we’ve been told about the relationship between Islam and the West.

We sat down with conservative intellectual Victor Davis Hanson, classics scholar Donna Zuckerberg, and French-Tunisian political scientist Nadia Marzouki to talk about President Trump’s speech, and try to unpack the question at the center of his message: Is the survival of the West the fundamental question of our time?