Upvote:2
I think the phenomenon is older than the recorded history. Literature is full of examples, since the beginning of its existence. Antigone is one example from Greek tragedy.
Upvote:3
Abraham and his almost sacrifice of his son Isaac might be a good example. Even though we do not know whether is a real event or just a metaphor.
Spartans at Thermopylae battle are a good example as well. They died because they had to fulfill a tradition (principle) where their society was built, which was to die instead of return defeated.