I’ve never heard anything about Huxley accepting God, so it seems safe to assume his general worldview never changed.
How ironic though, that his renowned work of fiction is a commentary that perfectly illustrates the horrible dystopia awaiting human society when it seeks utopia to the exclusion of God.
As for the human inclination to seek utopia.
Our founding fathers were seeking an earthly form of the good society, but not to the exclusion of God. Our founding fathers included God.
And so we can see, as illustrated in this article and the posts of this thread, that Liberty Is an Anti-Darwinian Concept.