The word 'catastrophe' has several meanings, but in its original meaning in Greek the word means a "sudden downturn" (in Greek katastroph? 'overturning, sudden turn,' from kata- 'down' + stroph? 'turning'). As for the word "superpower" it also has several possible definitions, but my preferred one is this one "Superpower is a term used to describe a state with a dominant position, which is characterized by its extensive ability to exert influence or project power on a global scale. This is done through the combined-means of economic, military, technological and cultural strength, as well as diplomatic and soft power influence. Traditionally, superpowers are preeminent among the great powers" this one, "an extremely powerful nation, especially one capable of influencing international events and the acts and policies of less powerful nations" or this one "an international governing body able to enforce its will upon the most powerful states".