The social context of the UK is more open to the future, the old pessimism has been scrubbed and there's a view that you can engage with the future again. There is quite a lot of optimism in British science fiction, much less of the sackcloth and ashes and 'we're all going to die' attitude that it used to have, whereas the Americans have become more entrenched and fearful since 2001.
I was raised thinking that moral and ethical standards are universals that apply equally to everyone. And these values aren't easily compatible with the kind of religion that posits a Creator. To my way of thinking, an omnipotent being who sets up a universe in which thinking beings proliferate, grow old, and die (usually in agony, alone, and in fear) is a cosmic sadist.