One of the most important dates on the Christian calendar is Christmas, the day set aside to celebrate the birth of Jesus Christ. There is a 1-in-365 chance that Jesus was born on December 25, but no one knows when Jesus was born. The date is of no great significance to the life of Christ. What matters is he was lived and died, and his life and death are the root of the world's most important religion. To Christians, the life of Jesus is the most important event in human history.
Whether Christianity is still the most important world religion is the most important part of that first paragraph, given the state of Christianity in the world. In Europe, where Christianity evolved and flourished in the Roman empire, Christianity is no longer an important part of the culture. The trappings of Christmas remain, largely for commercial reasons, but otherwise Christianity is just about gone. Islam and managerial liberalism are the most important religions in Europe.
In the United States, Christianity remains under assault by the usual suspects but remains an important part of the culture. Even in the secular regions, the cultural framework of Christianity remains in place. God has been replaced by "the tides of history" and Scripture with the latest slop from progressivism, but these things are just filling the hole left in the Christian framework. In the more normal parts of the country, Christian churches still dot the countryside.
There is no question that Christianity is on the wane in the Western world and that spells trouble for the Church globally. It is tempting to wonder if Christianity has a future at all, but the better question is what will it become in the future? The story of Christianity is survival and evolution. What we think of as Christianity today is nothing like what the early Christians experienced. Even medieval Christians would find modern Christianity to be weird and heretical.
For example, early Christians would be puzzled by the reliance on Scripture by many modern Protestant sects. The Gospels were not written until roughly a century after the life of Christ and his disciples. The first "Bible" was assembled by St. Jerome around A.D. 400 and included 27 books of the New Testament. In 382 A.D., the Council of Rome finished the process of determining the 73 books of the Bible. There were probably millions of Christians before there was a single Bible.
Then you have the fact that the Christianity that emerged from the Levant and began to spread around the Roman Empire ran into both Roman paganisms, but also the much more potent paganism of the Germanic barbarians. Many of the things we associate with Christianity were borrowed from these pagans. James C. Russell argues in his book, The Germanization of Early Medieval Christianity, that the culture and religion of Germanic pagans shaped Christianity.
Of course, there are "Bible believing Christians" who reject these claims, but these people are practicing a form of Christianity that could not exist if not for the evolution of the Church into the late Middle Ages. It was the revolution within Christianity that gave us Protestantism and to some degree its secular partner liberalism. The dynamic between the two is a hot topic today in dissident circles. There would be no "Bible believing Christians" without this evolutionary process.
This evolution of Christianity also helps explain why it survived at all. A handful of radical Jews changed the course of human history, by creating something that has motivated men to die for their belief in it. In 303, the Roman emperor Diocletian issued a series of edicts rescinding Christians’ legal rights, setting off a decade of persecutions, just as the early Christian were beginning to codify their faith. Despite this, the Church not only survived, but became much stronger.
There is a good argument to be made that the success of Christianity was due to its struggle in the face of persecution. Early Christians had to be smart, courageous, and resourceful to maintain their religion. This selected for the sorts of people who were willing to take on the enormous challenge of maintaining, spreading, and developing a fundamentally new moral and cosmological outlook. The early Christians had to be to the far right of the bell curve.
Another way to think of it is that Christianity was a new mind virus that quickly evolved to spread among its new host. It then had to evolve even faster once it broke out of its original population. When efforts to eradicate it came, it once again evolved rapidly to adapt to the changes in its host population. Like the common cold or the flu, there are lots of variant of the original Christian virus now. In the end, they all promise the same thing for those infected.
Still another evolutionary way of thinking about how Christianity survived and thrived is that it is a mutation in human thought. Until Christianity, monotheism was limited to Jews and Zoroastrians. Universalism did not exist. These two mutations combined in Christianity and spread through the life, struggle, and death of early Christians until it became a dominant trait. The irony here is that some Christians dispute evolution, but they would not be here if evolution were not real.
The point of all this is not to rustle the sensibilities of those Christians who think the reason for the Church is it is the will and word of God. The point is that Christianity exists at all because it has adapted and survived far worse that the commercialization of Christmas and the "happy holidays" nonsense. Christianity is facing a new challenge in the West, one to which it will have to adapt, while maintaining the thing that has allowed it to survive, which is the hope and courage it provides the believer.
The reason the West is in crisis is the new religion, that which the managerial class struggles to understand, even while they are preaching it, is not able to provide an answer to the questions Christianity has always been able to answer. Those questions are "Who says?" and "Why should I listen?" Men will live and die in defense of the answers to those questions. Whatever Christianity becomes on the surface, it will thrive because it answers the most important of man's questions.
The various Christian denominations need to get away from the “religion” of universalism and dei as well as allowing women and various sexual deviants in the priesthood and church upper echelons. The old traditions need to be resurrected.
The hollow alternatives based on skepticism and sin are self-limiting because they offer no reason to live or reproduce. Within the Catholic Church, the wishy-washy Novus Ordo movement is dying off with its aging proponents; all the energy is in the new traditionalists, who hunger for the Latin mass and other ancient trappings. This is good because the vile cult of Islam is prowling around like a roaring lion seeking souls to devour.