Too bad we live in a post-Christian society.
I would have greatly preferred had they talked about a Judeo-Christian society instead. Because every advantage mentioned in the excerpt also holds for a Judeo-Christian society.
And it almost goes without saying that Christians and Jews have a special connection.
What is the point of such a survey? Were you expecting to discover a survey of Christians saying that Christianity is bad for society??
How is “moral” different from “ethical”? Philosophers for centuries have used the two terms interchangeably.