Throughout the history, many heroes including Alexander, Napoleon, and Hitler tried to conquer the world with arms. But none of them was able to succeed in achieving their goal. But Jesus was able to conquer the world with His obedience and love in which He was hung on the cross and died for all men. Many Roman emperors persecuted Christians severely, but the Roman Empire had been conquered in the love of Christ, and then Europe was conquered and still now the world is being conquered.
"But you will receive power when the Holy Spirit has come upon you; and you shall be My witnesses both in Jerusalem, and in all Judea and Samaria, and even to the remotest part of the earth" (Acts1:8).