So to other obvious observations. OED has two strands for exclusion: one is tantamount to structural exclusion (i.e. not being admitted); the other to removal – more regularly banishment or ostracism. The noun exclusion seems fairly rare in literature (I did a brief concordance analysis of Jonson, for example; OED has earliest occurrence in 14th century). The first concept leads in many directions about rituals of inclusion and exclusion, qualifying status, and access to resources. The second can be analyzed on various levels from Durkheim’s sacredness of society through functionalism to the latter’s insistence on reintegration and the restoration of harmony – or, more likely, enmity and low-level self-help, continuing ostracism and acrimony.