What's changed is we now have good anatomical, geological, archaeological evidence that Neanderthals are not our ancestors. When I wrote 'Lucy,' I considered Neanderthals ancestors of modern humans. We have gone back twice the age of Lucy, six million years. And we see that upright bipedal walking goes back that far in time.
Only the most unapologetic biblical fundamentalists, for instance, take every biblical injunction literally. If we all took all scripture at the same level of authority, then we would be more open to slavery, to the subjugation of women, to wider use of stoning. Jesus himself spoke out frequently against divorce in the strongest of terms.