 Corroboree in many areas have developed and adapted, integrating new themes and stories since European occupation of Australia began.Academic Maryrose Casey writes that ‘Australian Aboriginal cultures are probably the most performance-based in the world – in the sense that explicit, choreographed performances were used for a vast range of social purposes from education, through to spiritual practices, arranging marriage alliances, to judicial and diplomatic functions’.Casey suggests that 'corroboree' could also be called 'aboriginal theatre'.