==[[Mozart]]'s ''Zauberflöte'', or The Magic Flute==
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Here's a fantastic Youtube clip of the "Three Boys" from Mozart's Magic Flute. One of the great paeans to [[The Enlightenment]], the three boys in this opera (technically a ''Singspiel'') sing about a better future free of war and ruled by reason. It's a shame that 200 years later, we're still not there yet.