In recorded history, the longest any one one government has lasted is probably the Byzantine empire, which lasted about a thousand years. The Christian church has lasted twice that long, primarily because the basic message which Christ taught is correct, and rings true in the hearts of men.
I wish I could tell anybody I had much of a history of being a Christian. I have finally arrived at Christianity via the servant's entrance and a sort of a process of elimination more or less, in other words, Christianity at long last appears to be one of those things like democracy which look increasingly better as you examine the possible alternatives. The alternatives appear to me to include Islam which I've no use for under any circumstances, Budhism which does not really answer many questions and has limited appeal outside of the orient, Judaeism which is a sort of a rich man's version which I can't afford, and the theory of evolution and doctrines based on it such as communism, naziism, and secular humanism, whatever that's supposed to mean.
The biggest hangup I used to have with Christianity was purely practical in that the idea of turning the other cheek did not seem conducive to survival where I was growing up and that was amplified by exposure to evolutionary ideas which made sense to me at first, along with the general paradigm of life as a constant struggle, and two of the best philosophers and writers I encountered early on, i.e. Nietzsche and Robert E. Howard, both viewed barbarism as man's natural state and anything else as a temporary abberation.
It is that part of it which I no longer believe, and the basic reality is that Nietzche's starting assumptions were simply wrong; there is nothing at all wrong with Nietzsche's logic. Richard Heinberg's "Paradise" and Julian Jayne's "Origins of Consciousness" both cast major doubt upon the idea of man's original state and nature being savage or barbarous; a careful study of very ancient history refutes it.