I've recently been exposed to the concept that in international relations theory, the state should be viewed as a "black box" a unitary actor who's internal goings have no relevance. As I understand it both realist and neoliberal theory hold this to be true. Although I suppose I can understand how this might make sense within the framework of an intellectual excercise, I do not see how it could have any relevance to the real world, where quite clearly, the religion, government type, and culture of every country have a huge impact on their relations with other countries. I'd be very interested in hearing how someone who is a proponent of this view would justify its relevance, or if I've misunderstood it, explain how it really works.