This is a very long article, but it's full of interesting scientific evidence that's relevant (though it seems that it picks up in relevance part way through).

This is a very long article, but it's full of interesting scientific evidence that's relevant (though it seems that it picks up in relevance part way through). If someone can find a more focused discussion that has the same level of engagement with the literature, that would be great, but for now, I'd recommend reading it.