The Phoenicians were sea going traders, and traveled all around the Mediterranean. They were an advanced Civilization, and through their trade and contact with others they spread their knowledge and customs.
Christianity did not easily spread through the Roman Empire. See the related question, "How did Christianity spread throughout the Roman Empire?"
Phoenicians spread the Middle Eastern civilization throughout the Mediterranean.
The Phoenician traders spread the alphabet through the Mediterranean Sea. It was taken up by the Greeks and adapted as their own alphabet, and they spread this to their own colonies.
the Mediterranean Sea i
Islam
During the Hellenistic Period (roughly the fourth century BC through the first century BC) Greek culture spread throughout the Mediterranean, first by Alexander the Great's conquest, then by the Roman empire.
Christianity, specifically Catholicism.
Through truth.
television
The Phoenicians were sea going traders, and traveled all around the Mediterranean. They were an advanced Civilization, and through their trade and contact with others they spread their knowledge and customs.
Mahayana Buddhism.
Christianity, which they spread to the Near East during the Crusades.
Hinduism is a religion that originated in and spread through out India but spread to only a limited portion of the rest of Asia.
Religion has always existed. Atheism is more recent. No natural society ever existed whose members did not believe in the supernatural.The question, then, could be how a particular religion spread.See the Related Link.The earliest belief
Christianity
It happened gradually, as Jews moved to new areas in Europe, western Asia and the Mediterranean region.