Are all societies and cultures morally equal?

[Dayuhan]

some activities pursued by particular cultures are simply not acceptable and in the extreme risk the survival of the culture. There is a distinct religious subculture in the US called the Shakers. Essentially harmless, their belief that [B]all[B] sex is sinful stops them from procreating. They survive - barely - on converts and one day there won't be any converts; then their culture will die having committed cultural suicide. Their beliefs are simply self-destructive.

That would of course be immoral if we assume that survival is a moral imperative.

The question is only relevant if we have a consensus definition for the term "moral". If you believe that "morality" is an externally sourced absolute, then you will of course not believe that societies and cultures are morally equal, though among those who believe in externally sourced absolute morality there will be a good deal of disagreement about what exactly that moral code calls for. Every self-appointed mouthpiece for the absolute seems to have their own ideas on the subject.

If you believe that "morality" lies in actually following one's own professed beliefs, than we are probably all immoral, though perhaps unequally so.