Christianity is responsible for much of the progress of the USA. Progress in the areas of Science, Technology, Society.

Yes, and Martha Graham's modern dance is directly responsible for Salks polio vaccine, the centrifical flywheel, and the Brookland Dodgers moving to LA.

How so?

Really? Seems historical fact does not support your statement:

"Where do we find a precept in the Bible for Creeds, Confessions, Doctrines and Oaths, and whole carloads of other trumpery that we find religion encumbered with in these days?"
"The divinity of Jesus is made a convenient cover for absurdity."
"This would be the best of all possible worlds, if there were no religion in it."
-John Adams, U.S. President, Founding Father of the United States

"Religions are all alike – founded upon fables and mythologies."
"I do not find in orthodox Christianity one redeeming feature."
"Christianity is the most perverted system that ever shone on man."
"It does me no injury for my neighbor to say there are 20 gods, or no God. It neither picks my pocket nor breaks my leg."
-Thomas Jefferson, U.S. President, author, scientist, architect, educator, and diplomat

"During almost fifteen centuries has the legal establishment of Christianity been on trial. What has been its fruits? More or less, in all places, pride and indolence in the clergy; ignorance and servility in the laity; in both, Famous Atheist & Quotessuperstition, bigotry, and persecution."
"In no instance have . . . the churches been guardians of the liberties of the people."
"Religious bondage shackles and debilitates the mind and unfits it for every noble enterprise."
-James Madison, American president and political theorist (1751-1836).

"The Bible is not my book nor Christianity my profession. I could never give assent to the long, complicated statements of Christian dogma."
- Abraham Lincoln, American president (1809-1865).

"I have found Christian dogma unintelligible. Early in life, I absenteed myself from Christian assemblies."
"Lighthouses are more helpful then churches."
-Benjamin Franklin, American Founding Father, author, and inventor

"I do not believe in a personal God and I have never denied this but have expressed it clearly. If something is in me which can be called religion than it is the unbounded admiration for the structure of the world so far as our science can reveal it."
"I cannot imagine a God who rewards and punishes the objects of his creation, whose purposes are modeled after our own -- a God, in short, who is but a reflection of human frailty. Neither can I believe that the individual survives the death of his body, although feeble souls harbor such thoughts through fear or ridiculous egotism."
"I do not believe in the immortality of the individual, and I consider ethics to be an exclusively human concern with no superhuman authority behind it."
"If people are good only because they fear punishment, and hope for a reward, then we are a sorry lot indeed."
-Albert Einstein, German-born American physicist

"Religion is all bunk."
"I cannot believe in the immortality of the soul.... No, all this talk of an existence for us, as individuals, beyond the grave is wrong. It is born of our tenacity of life – our desire to go on living … our dread of coming to an end."
-Thomas Edison, American inventor (1847-1931).

"I don’t believe in God. My god is patriotism. Teach a man to be a good citizen and you have solved the problem of life."
-Andrew Carnegie, Scottish-born American industrialist and philanthropist

"I am an atheist, out and out. It took me a long time to say it. I've been an atheist for years and years, but somehow I felt it was intellectually unrespectable to say that one is an atheist, because it assumed knowledge that one didn't have. Somehow it was better to say one was a humanist or agnostic. I don't have the evidence to prove that God doesn't exist, but I so strongly suspect that he doesn't that I don't want to waste my time."
"Creationists make it sound like a 'theory' is something you dreamt up after being drunk all night"
-Isaac Asimov, Russian-born - American author

"All thinking men are atheists."
On page 144 of Paul Johnson's book Intellectuals, it states that despite being raised in a strict Congregationalist household, Ernest "did not only not believe in God but regarded organized religion as a menace to human happiness", "seems to have been devoid of the religious spirit", and "ceased to practise religion at the earliest possible moment."
Other's have pointed out that Hemingway used the non-existence of God as a theme in his books.
-Ernest Hemingway, American author (1899-1961).

"My view is that if there is no evidence for it, then forget about it. An agnostic is somebody who doesn't believe in something until there is evidence for it, so I'm agnostic."
-Carl Sagan, American astronomer and author

"I do not consider it an insult, but rather a compliment, to be called an agnostic. I do not pretend to know where many ignorant men are sure. "
"I believe that relgion is the belief in future life and in God. I don’t believe in either. I don’t believe in God as I don’t believe in Mother Goose."
-Clarence Seward Darrow, American lawyer (1857-1938).

"The memory of my own suffering has prevented me from ever shadowing one young soul with the superstitions of the Christian religion."
-Elizabeth Cady Stanton, American suffragist (1815-1902).

"There is so much in the bible against which every insinct of my being rebels, so much so that I regret the necessity which has compelled me to read it through from beginning to end. I do not think that the knowledge I have gained of its history and sources compensates me for the unpleasant details it has forced upon my attention."
-Helen Keller, American lecturer

"No Gods, No Masters."
-Margaret Sanger, American birth control activist, founder of Planned Parenthood (1883-1966).


Just a few from a very long list!

Yeah, I'd like to see the reasoning behind that one.

__________________
"I will continue to be an impossible man as long as those men who are possible today remain possible." - Bakunin, letter to Ogarev.

"The ultimate aim of production is not production of goods, but the production of free human beings associated with one another on terms of equality." - John Dewey.