And so we come to the seventh and last period of our overview: modern Christianity. I hope the journey's been enlightening.
Let's begin with a rapid overview of Christianity prior to the modern era as a review. (If we can do this, it will be quite an accomplishment! More than 1500 years in bullet list!)
Done! Short enough, I think!
Let's describe what happened in modern Christianity from there.
It was inevitable that once the Roman Catholic church's power was broken, others would want to free themselves from the rule of the Lutheran (Germany) and Reformed (Switzerland, Holland, and England) Churches and the Church of England.
The Puritans were the greatest source of free churches in modern Christianity. At first this was a movement in the Church of England that wanted to purify the Church (of Catholic dogma, not necessarily purity of life). When this failed, others arose, called "Separatists," who determined that if they could not reform the Church, they would form their own.
These Puritans turned Separatists went in all directions, but primarily to Holland and to the New World, which provided tremendous opportunity to escape religious persecution.
The atmosphere was now such that it was no longer unthinkable to leave the state church, and it began happening more and more often. In England in the 16th century, George Fox founded "societies of friends" all over England who would become known as Quakers.
In the 18th century, Anglican priest John Wesley founded societies of "Methodists" in the new world. While he intended them to remain part of the Church of England, it was apparent to all others that they would not. They rapidly became their own denomination.
One of the more major free churches of modern Christianity, of course, is the Baptist church. It would be more proper to say Baptist churches, however, since I saw a book 25 years ago describing 200 different denominations of Baptists in the United States. It's commonly thought that these descended from the Anabaptists, but they did not.
The Baptist denominations are descended from British Separatists, though they did adopt the Anabaptist practice of rebaptizing converts from the Churches practicing infant baptism (which included all the major Reformation churches). In fact, it is likely this influence came to the Baptists through Mennonite (a Dutch branch of the Anabaptists) influence upon John Smyth and Thomas Helwys around 1608 to 1610.
You can read a more thorough history of the Baptists from the British Baptist Historical Society at Christianity Today.
A major influence on my own life has been the Plymouth Brethren churches and their successors. These arose in England in the early 19th century, founded by a man named J.N. Darby. Darby later excommunicated other brethren churches and fled to Switzerland claiming the church age was over, but the Brethren legacy in England did not die. Quite the opposite! It survived to influence not just me but much of the world and much of modern Christianity.
Some of the most notable 19th and early 20th century missionaries and teachers were of Brethren descent. Men and women like Hudson Taylor, C.T. Studd, Amy Carmichael, Jim Elliott, George Mueller, and Watchman Nee all were strongly brethren influenced.
Pentecostal churches did not arise until the 20th century, sparked by the Azusa Street Revival in the Los Angeles area in 1906.
Roman Catholicism had to do a lot of adapting after the Reformation. First, they had their own counter-Reformation, led by Ignatius of Loyola. They also convened a council to assess and reaffirm their own doctrines in 1545 called the Council of Trent. Interestingly enough, this council met convened 25 times over 18 years, not ending until 1563.
The Reformation and the centuries afterward stripped the Roman Catholic Church of almost all its political power. First churches freed themselves from the rule of state churches, and only later did the governments begin to strip themselves of the influence of the various major churches.
The Roman Catholic church retained much of its influence (and still does) over Italy, Spain, and Portugal. As a result, they also had and have much influence over South America, which was colonized by Spain and Portugal.
Distance, however, and conversion by the sword, which rarely if ever converts the heart, has led to a very different form of Catholicism in South America. In many places, it is mixed with local nature religions, including voodoo. Even where it is not, the emphasis on the veneration of saints and Mary is much greater in the South American countries (and Mexico) than in Europe and North America.
Modern Christianity influences, Protestant criticism, the 60's rebellion, or perhaps simply the liberal bent of Pope Paul XXIII, led to large changes in Catholicism beginning in the 1960's. The Mass, which had always been said in Latin, was translated into the local vernacular. Protestants were embraced as "separated brethren," and numerous other policies were relaxed. (For example, lay ministers, at first only men but later including women, were allowed to distribute the Eucharist to Mass attendees.)
There are many influences responsible for the state of modern Christianity in the 21st century. There was a tendency to liberal theology among Protestants and Catholics in the 19th century, influenced—in the opinion of many historians—by the rising authority of science.
This liberal theology questioned things like the authorship of the books of the Bible and standard interpretations of history. It also rebelled against strict interpretations of doctrine and dogma.
By the early 20th century, however, this led to a backlash against liberal theology and fundamentalism arose. Fundamentalists wanted a return to a strict, enforceable orthodoxy and to renewed reverence for the Bible. Fundamentalists have become a powerful force in American religion and politics, though they have had very little influence in Europe.
One of the largest influences on our 21st century modern Christianity, however, is the 60's rebellion against all types of established authority in America. The rising emphasis on individualism led to a rapid increase in the number of denominations as well as to an increase in unchurched or home-churched Christians. It has also led to many unusual (from a historical standpoint) worship methods, with even rock and roll music becoming part of Christian worship.
Today it remains to be seen what will become of are new information age. The rise of the internet has given voice to numerous people who would have had no audience at all 30 years ago, or very little (like myself, in fact). What effect this will have on Christianity as we know it is hard to predict. (Atheists, of course, predict the downfall of Christianity due to their increased voice, but as of 2009 I see no indication this is true.)