The current subtitle is "where {political, social, economic} crosses {cognition, behavior, systems}". Amusingly enough, this syntax on a unix shell actually gets you the 9 combinations:

~% echo {political,social,economic}{cognition,behavior,systems}
politicalcognition politicalbehavior politicalsystems
socialcognition socialbehavior socialsystems economiccognition
economicbehavior economicsystems

Tossing together groups of words is a good thing, since unexpected phrases suggest unexpected meanings. For example: Scott McCloud's story machine, where the point is to force yourself to see randomly generated new ideas.