it's simple. the west is the most opulent society to ever exist, the most comfortable lifestyle and the most materialistic. there are pros to this (like having better medical equipment/treatment/medicine) but in reality most are in a bubble outside of the "real" world, they rarely see death, true suffering and the harsh reality of life any more. so they see no need for god. the bible even explains this through the rich man and the eye of a needle analogy and how god comes to those at their lowest point, it's why you often see addicts come to god before suicide for example (atheists seem to think this is a gotcha "hur hur it's only because they're desperate etc") as they've hit rock bottom, just as jesus explained to the pharisees when asked why he was hanging around with what they deemed as the lowest of the low in society (prostitutes and lepers etc). fewer people in the west hit rock bottom anymore, in fact they get nowhere near, in fact they can't even exist outside of what most other humans in history would call luxury, they find that difficult and do all they can to avoid it, but by avoiding that you're also avoiding reality and therefore god himself.  the closest most materialists will get to experience god, living in the western world, is when they're at a quiet place in nature (because it's back to reality) outside of that most of us in the west are surrounded by noise, man-made gizmos, distractions, lights, gossip and a me me me personality. only through humility, fasting and looking for something outside of not only yourself but this material world can you then find that very thing - god.  the higher iq of european man can also be seen as a curse in this light, too caught up in the mind, too caught up in trying to control everything all the time, sucked into one's own world, constantly me me me along with "i better get mine before someone else does" mentality. it also perfectly describes autism, but autists can become the most zealous.
United Kingdom