Why did Christianity spread throughout Europe during the Byzantine Empire??

Areas controlled by the Romans were peaceful.

Well constructed roads made traveling easier.

The common language made it easier for people from different parts of the empire to communicate.

People liked the hopeful message of Christianity, and Christianity provided them comfort with God’s love and the promise of heaven/a better afterlife.

The members of Christian communities helped each other out  

for the united states of america, 1945 to 1964 was a time of high economic growth and general prosperity. it was also a time of confrontation as the capitalist united states and its allies politically opposed the soviet union and other communist countries; the cold war had begun.

explanation:

our current president donald trump