Sentence:  The difference is still significant, however, in circumstances where the possibility of widespread adherence to an extensive set of obligations is unlikely, for "<WSD>transformationalism</WSD>" would support the watering down of the regime in exchange for broader membership, in the belief that the operation of the regime will, over time, increase the convergence of interests. 
Meaning of the word marked with <WSD> tags:  A political theory that emphasizes assimilation as a process of global cultural convergence.