Comments by "Bob Roberts" (@YourHineyness) on "Ancient Apocalypse - The Sea People: Catalysts of Bronze Age Collapse | Full Documentary" video.
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I think perhaps the Hekla volcano erupting in Iceland about that time may be what lead to the drought and the sea temperature falling.
"Hekla (H3) is considered the most severe eruption of Hekla during the Holocene. which threw about 7.3 cubic kilometres (1.8 cu mi) of volcanic rock into the atmosphere, placing its Volcanic Explosivity Index (VEI) at 5. This would have cooled temperatures in the Northern Hemisphere for several years afterwards. Traces have been identified in Scottish peat bogs, and dendrochronology shows a decade of negligible tree ring growth in Ireland. An eighteen-year span of global cooling that is recorded in Irish bog oaks has been attributed to H-3. The eruption is detectable in Greenland ice cores, the bristlecone pine sequence, and the Irish oak sequence of extremely narrow growth rings. A research team led by Baker dated it to 1021 BC ±130. Some Egyptologists have dated the eruption to 1159 BC, and blamed it for famines under Ramesses III during the wider Bronze Age collapse."---Wikipedia, article titled "List of volcanic eruptions in Iceland".
So the volcano caused the drought, the Sea People went a-Viking to avoid starvation, a bunch of earthquakes struck, there were internal revolts as people attacked their own rulers' palaces trying to get the grain stored there, the Sea People caught the cities in a weakened condition, and viola! the Bronze Age collapse. Just a theory.
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