I would really encourage you to take a look at this article on the way the coming of Jesus Christ affected all of western civilization. A key quote:
“if you live in the West, the claims of Christmas have profoundly shaped your life and view of the world. You don’t have to believe in Jesus or even think about him for that to be true.”
Let me know if you can’t get to it behind The New York Times paywall.
Link: https://nyti.ms/3sDlLut