I'd say in a certain sense, Christianity achieved it's goal in the end, no matter how many atheists and agnostics there are.
For many centuries in the West, there has been widespread consensus on the importance of Judeo-Christian ethics and the values of the New Testament, even when the religious language and context are stripped away. Similarly, in Asia Buddhism and Confucianism have so thoroughly permeated society, that people in East Asia practice Confucian values without even realizing where it came from.
Whatever one thinks about it, religious values have just permeated world societies in a way that German and French philosophy professors never have.