A Quotation Which Explained A Few Important Things To Me

[Space_Karen]

Quote

The Jews, with their long and assured tradition of monotheism, had much to offer to a world looking for a sure, single God, but their ethics were in some ways even more attractive than their theology. The jews were admired for their stable family life, for their attachment to chastity while avoiding the excesses of celibacy, for the impressive relationships they sustained between children and parents, for the pecular value they attached to human life, for their abhorrence of theft and scrupulosity in business.

But even more striking was their system of communal charity. They had always been accustomed to remit funds to Jerusalem for the upkeep of the Temple and the relief of the poor. During the Herodian period they also developed, in the big diaspora cities, elaborate welfare services for the indigent, the poor, the sick, widows and orphans, prisoners and incurables. These arrangements were much talked about and even imitated, and of course, they became a leading feature of the earliest Christian communities and a principal reason for the spread of Christianity in the cities.

On the eve of the Christian mission they produced converts to Judaism from all classes including the highest: Nero's empress, Poppaea, and her court circle, were almost certainly God-fearers, and King Izates II of Adiabene on the Upper Tigris embraced a form of Judaism with all his house. There were probably other exalted converts. Certainly many authors, including Seneca, Tacitus, Suetonius, Horace and Juvenal, testity to successful Jewish missionary activity in the period before the fall of Jerusalem.

Was there a real possibility that Judaism might become the world religion in an age which longed for one? Or, to put it another way, if Christianity had not intervened, capitalized on may of the advantages of Judaism, and taken over its proselytizing role, might Judaism have continued to spread until it captured the empire? That was the way some Jews in the diaspora certainly wished to go; the same Jews, of course, who embraced Christianity when the opportunity arose."

-A History of Christianity by Paul Johnson

 

Try reading only the bolded parts. 

This appears to explain in more specific terms how Christianity spread from the Apostles to reach the entire world.

Christians were the only ones who cared about human life enough to make a legitimate effort to help the sick and poor.