How does Prometheanism differ from (non-statist, lower-case “l”) libertarianism?
In the inclusive sense libertarianism is simply theory against the use of force in a political sense (endorsing force only in self-defense, or even not at all for pacifist libertarians). While libertarianism is defined by reaction against force, reducing social relations to terms of force is merely one of the overall models of analysis employed by Prometheanism. While libertarianism has been defined by a doctrine (no matter how useful), Prometheanism is defined by a purpose and process, to which doctrines are subordinated. See also the answers on Libertarianism above and individualist anarchism below.