This is a very interesting question. I would say that Christianity has one of the best organization systems in place. The reason for this is threefold.
First, Christianity has been around for a long time. So, it has passed the test of time. Through trial and error, it was able to create robust structures.
Second, very few religions can boast of truly being global. Christianity can be found in every part of the world. It is certainly not just a western religion. For example, there are more Protestants in Asia than in North America. For this global reach to take place, some very good organizational skills have to be in place.
Third, Christianity has a certain level of hierarchies in place, which creates for good communication. The Catholic church is the perfect example with it bishops, cardinals, and pope.