Then I have a slide at the end to motivate discussion until the end of class. I thought you all might be interested in it. We talked about Vernon Smith when we discussed "modern Smithians" in the Adam Smith lectures, so they are familiar with constructivist vs. ecological rationality.
The important things for me are for them to understand Hayek is making more than just a libertarian claim - he's making a claim about spontaneous order and planning. Second, I want them to just think through all the things economists have said that we've discussed and how it applies to the Fatal Conceit quote, and third I want to challenge them to not take Hayek at face value.
Exactly why isn't a radical change to the evolved social order like libertarianism in flat contradiction of the point Hayek is trying to communicate here?!?!
Most of the lecture is straight up ABCT, but I think this will be a discussion they will be more interested in ending with.