I didn’t think that a 20-minute video on the origins and use of the words “liberal” and “liberalism” could hold my attention and draw me in. I am notoriously impatient and I have a strong preference for videos that are less than 5 minutes. But this one, “Semantic History of Liberalism,” by Daniel Klein, given last month at Universidad Francisco Marroquin, did draw me in. There were some surprises along the way. One interesting bottom line: the important role of Adam Smith in the spread of the word “liberal.”