Ousterhout's Dichotomy attempts to split the language world into system and scripting languages. This split isn't simple, and doesn't work. But understanding where it fails is a great way to approach the concept of power in programming languages. In this talk we will cover - what it means to be powerful - how Clojure's design gives you power - the relation between power and stratification - why the numerics changed in 1.3 - a post-Ousterhout classification scheme that is more useful - some predictions for Clojure's future. Less