For two-hundred-plus years, Western culture (especially America) has been shaped by the Judeo-Christian worldview. Not all citizens of the West were orthodox Christians nor were Western nation-states theocracies. Yet, the contours of the social and intellectual life of Western culture were largely moralistic and spiritual.
In the last one hundred years things have changed. The West is largely secular and at times anti-religion, especially anti-Judeo-Christian. How did this happen? The process is interesting and revealing.