There is no “Truth” with a capital “T” in science. All science can do is show us for a time what may be happening until we find a better theory. Only math contains a grain of truth and math could not exist without design.
Atheism is totally irrational since they “think” that everything comes from nothing and chaos. All the Design in Nature proves a Designer, at least. Whether you “believe” in a Deity is the key to Objective Truth (Our Constitution)——which is the most rational way of truly thinking and the ONLY moral way to perceive a just earth for humans.
Christianity is the most ethical system of any theology or philosophy. Only the Christian worldview created the Age of Reason and the Renaissance and the US Constitution. No other belief system has free will and Natural Law Theory as its basis—that of logic and reason and individualism (what makes us human and gives us dignity).
There is no more “perfect” system of morality since you can never use another person as a Means to an End in true Christianity. Darwinian “ethics” is removal from rationality and totally inhumane-—and is pragmatic-—the survival of the fittest where the individuals can be killed, enslaved or sodomized and it is “good” if the State benefits.
“Design in Nature proves a Designer” that’s funny!
Christianity was very important to the Creation of our civilization and this country, there is no denying that and I give it much of the credit. But so was the house drawn carriage, doesn’t mean we still need it.
I’m an objectivist, I think that fits your ethical system requirements. And we don’t use other people...its explicit in the creed, “I swear by my life...”
And most objectivists I know are Republican voting, small l libertarians.