[marktwain]

there was supposedly a civilizational collapse around 1200 BC brought on by interruption of tin trade routes. You tube genius here.

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Or, it could have been the trade routes were interrupted by civilizational collapse.

It is difficult to show which is cause, which is effect.

[sopo]

true, but they were still using bronze and not iron, which this article says was smelted from ore long before.