On the furtherance of humanity’s enlightenment, in terms of how we treat each other, I hope I’ve already demonstrated ample evidence that in the degradation of, or absence of religious belief, there is no evidence that we will live enlightened lives.
On humanity’s enlightenment in terms of our understanding and growing knowledge, there are innumerable Christians, throughout history and current, who have made an enormous contribution to our understanding of the world. A brief list would include Boyle, Lavoisier, Faraday, Mendel, Lemaitre, Newton, Dalton, Gauss, Collins, Pascal, Babbage. (Many people of other faiths too).
Our understanding of elements, compounds, gases, chemistry, electromagnets, genetics, mathematics, expansion of the universe, physics, motion, atomic theory, cloning, genome, probability theory, and computing would all be much less were it not for these devoutly religious people, and many more besides.
All of them theists in their understanding of life and how life works. All of them making a significant scientific contribution.