In my opinion, I think everyone who grew up in Western civilization was influenced by 2000 years western history and culture, just like everyone in China is influenced by 2000 years of Chinese history culture. I don't think one can escape history.
In the west, that history and culture is predicated in many ways by a Christian ethos.
Almost everyone in China is influenced by a Confucian and Buddhist ethos, whether they realize it or not.
I don't think morality just comes from common sense. The parable of the good Samaritan was so radical precisely because it didn't comport with common sense. It may seem like common sense on a superficial level to us because we have a two thousand year old cultural memory of it, but most of the stuff I've read in the sacred religious texts of Buddhism, Christianity, Taoism, would not necessarily be perfectly sensible to someone from the time period Assyrian, Aztec, or the Carthaginian Empires.