At the moment, statistically, it does. Look it up.
Sorry, but on the contrary, the basis for most of the accomplishments in the west has, indeed, been Christianity. the discovery of real science…the invention of universities. Most important, it was the west that invented human rights, began law and economic systems that didn’t merely help the rich, that fought and ended slavery, too many, many things to mention. Pick up “The Victory of Reason” by Stark and “The Genesis of Science” by Hannam.
The research on illegitimacy or single parenting, or whatever you prefer to call it., from places as varied as China and South Africa, France and Brazil is frightening. Alas, the emotional problems are, for too many, lifelong. The staggeringly higher suicide rate. The much higher ratio of school failure, and later, failure to succeed in jobs. The inability to be able to form a stable marriage later in life. The hugely higher ratio of drug and alcohol abuse, compared to the children of two parent families.
And no, it doesn’t even have much to do with economic issues. The children of the truly rich may not end up homeless, but, if they are not raised in a two parent family, irregardless of their wealth, they are far more likely to end up with drug or alcohol or emotional problems. Look at the children of movie stars; walking wounded, no matter how much fame and money they grew up with.