Threats to Interplanetary & Interstellar Civilizations (Narration Only)

Natural disasters can topple civilizations, even in modern times, but with more and more technology civilizations become more robust and capable of predicting future calamities and preventing such ruin. So what other threats face spacefaring civilizations, both at the interplanetary and interstellar scale?
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Credits:
Threats to Interplanetary & Interstellar Civilizations
Episode 197, Season 5 E32
Written by:
Isaac Arthur
Editors:
Darius Said
Jerry Guern
Keith Blockus
Stuart Graham
Matt Campbell
Cover Art:
Jakub Grygier
Graphics by:
Bryan Versteeg
Fishy Tree
Jarred Eagley
Jeremy Jozwik
Ken York
Sergio Botero
Produced & Narrated by:
Isaac Arthur
Music Manager:
Luca DeRosa
Music:
Paradox Interactive, "The Titan"
Kai Engel, "Endless Story About Sun and Moon"
Lombus, "Hydrogen Sonata"
Aerium, "Waters of Atlantis"
Stellardrone, "Crystal Spheres"
Marcus Warner, "The First Few Waves"
Epic Mountain, "Space Travel"

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