Effective Programs: Rich Hickey on Clojure at 10

HN's go-to link in typing debates and for talk lists, and several call it their favorite programming talk even for non-Clojure users.

Rich Hickey's talk at Clojure's tenth anniversary on the kind of programs Clojure is designed for. He argues for situated programs that deal with changing requirements, and for dynamic typing and data over static types.