Christianity emerged from Judaism in the first century of the common era. Christian brought from Judaism its scriptures (the Old Testament) and fundamental doctrines such as monotheism, and the belief in a moshiach (Hebrew term for messiah; this term is more commonly known as Christ (Greek.) The Jewish picture of the messiah is a national one - the deliverer of Israel, and has significant differences from how Christians understand the term. Christianity developed a new form of the messiah, in which Jesus became the son of God in a literal sense, and the saviour of all mankind.
Starting with the events recorded in the Gospels and Acts, Christianity grew from the personal practice of a minority of Jews, to the dominant religious group of the Mediterranean world in little over 300 years. It also gained important extensions to the east and south of the Mediterranean. This section will examine those first 300 years.
Disputes of doctrine began early on. The newly-organised church organised councils to sort matters out. Some groups were rejected as heretics.
Christianity was far from the only religion seeking and finding converts in the 1st century. Modern historians of the Roman world often discern interest in what they tend to call mystery religions or mystery cults beginning in the last century of the Roman Republic and increasing during the centuries of the Roman Empire. Roman authors themselves, such as Livy, tell of the importation of "foreign gods" during times of stress in the Roman state. Judaism, too, was receiving converts and in some cases actively evangelising. The New Testament reflects a class of people referred to as 'believers in God' who are thought to be Gentile converts, perhaps those who had not submitted to circumcision; Philo? of Alexandria makes explicit the duty of Jews to welcome converts.
Christianity was not restricted to the Mediterranean basin and its hinterlands; at the time of Jesus a large proportion of the Jewish population lived in Mesopotamia outside the Roman Empire, especially in the city of Babylon, where much of the Talmud was developed.
This is a bit sketchey, not sure about the title either. currently readin up on this...
In many revolutionary movements the church was associated with the established repressive regimes. Thus, for example, after the French Revolution and the [Mexican Revolution]? there was a distinct anti-clerical tone in those countries that exists to this day. On a more extreme level, Karl Marx condemned religion as the "opium of the people"[1] and the Marxist-Leninist? states of the twentieth century were officially atheistic.
Christianity in the 20th century was characterised by accelerating fragmentation. The century saw the rise of both liberal and conservative splinter groups, as well as a general secularisation of Western society. The Roman Catholic church instituted many reforms in order to modernise. Missionaries also made inroads in the [Far East]?, establishing further followings in China, Taiwan, and Japan.
In Europe there has been a general move away from religious observation and belief in Christion teachings and a move towards secularism. For example the Gallup International Millennium Survey[2] showed that only about one sixth of Europeans attend regular religious services, less than half gave God "high importance", and only about 40% believe in a "personal God". Nevertheless the large majority considered that they "belong" to a religious denomination.
In North America and South America, the other two continents where Christianity is the dominant professed religion, religious observation is much higher than in Europe.