In the Bible, every jot and tittle is masterfully placed by God. The birth of Christ is placed in Matthew as the 7th item in a list of sevens. His genealogy includes many imperfect people, gentiles... those he will die to save. This part of Matthew recounts Genesis, where even then, the stage is being set for Jesus to save mankind. He's the promised son from the Old Testament, the anointed one. The whole Old Testament has been building to the Christ, and here in Matthew 1, he has arrived!