I have just (belatedly) listened to Radiolab's hour-long show devoted to words. This show is NOT (for the most part) about word origins or about felicitous grammar or about exemplary uses. It is, instead, an inquiry into the part our words play in our thoughts. What happens to thought when we don't have words? What happens to people who are cut off from words? What is it with Shakespeare and words?
This is a really wonderful hour, well worth listening to.