John McWhorter on the Evolution of Language and Words on the Move

How did bad come to mean good? Why is Shakespeare so hard to understand? Is there anything good about "like" and "you know?" Author and professor John McWhorter of Columbia University talks with EconTalk host Russ Roberts about the unplanned ways that English speakers create English, an example of emergent order. Topics discussed include how words get short (but not too short), the demand for vividness in language, and why Shakespeare is so hard to understand.