The better culture

If we can't agree that one culture is better than another, can we agree that a culture that allows all cultures to flourish -- a multicultural culture -- is better than one that allows only a select few to flourish?

In other words, is our culture better than that of China, Iran, Pakistan, and Egypt?

Or are they all the same and equally-valid?

If they're all the same and equally-valid, we can do away with multiculturalism without concern, I think.