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by Mirioron 2181 days ago
This is an off-topic point, but perhaps this TED talk by James Flynn might give you a perspective to understand why your parents and grandparents tought: https://www.youtube.com/watch?v=9vpqilhW9uI

It posits the idea that the way of thinking back then was different, because they had to overcome different cognitive challenges from us today. This would shape how people back then viewed the world.