“Glory to God in highest heaven, and peace on earth to those with whom God is pleased” (Luke 2:14).
There was fighting among people before Jesus was born and people have been fighting ever since then too. So it seems strange that the angels announced that Jesus’ birth brought peace. Many, many years before, the prophet Isaiah talked about peace too. He called Jesus “the Prince of Peace” (Isaiah 9:6). So how did Jesus bring peace if He didn’t stop people from fighting?