It is interesting how the Old Testament of the Bible is often in contrast with the New Testament.
For example, in the story about the tower of Babel, God confuses the people’s languages and since they can no longer communicate, they scatter. He did this because they were working together; their goal was so that the world would know them.
Fast-forward a couple thousand years and we hear Jesus praying for unity — that his followers would be one. His goal was so that the world would know God.
A few weeks after this, at Pentecost, language differences were temporarily overcome, with people hearing about Jesus in their native tongue.
Although Jesus’ prayer for unity goes far beyond supernaturally restoring what was lost at Babel, it was a start. But Jesus’ ultimate goal was that his followers would be one, thereby not hampering the spreading of their faith.