Augustus
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Am I correct in recalling that it is your position that all belief is myth?
No, not all belief is myth. It's not a myth to believe the Olympics are happening now for example.
Additionally, is it your position that beliefs in myth are necessary or required? Essentially, that we cannot function without myths?
All ideology is grounded in myth, and humans cannot function without ideology.
Your definition of myth might differ from mine though. Importantly, it is not pejorative at all.
Myth: an explanatory narrative that is not objectively true.
All belief systems require axioms and these axioms must be justified somehow. We justify these via narratives that explain why things are desirable.
Someone might say we need to take care of the planet because it is god's creation.
Another person might say we have a duty to Humanity and the future generations.
Both are myths.
You didn't answer this
In terms of equating belief systems with other, which pair of belief systems share more in common (and do you think it is particularly close):
1. Liberal protestantism and Secular Humanism
2. Ancient Greek religion and Liberal Protestantism
3. Ancient Greek religion and Secular Humanism