A major theme of the book of Genesis, seldom recognized, is that it covers the stories of a lot of flawed and sinful people and that includes the main players Abraham, Isaac and Jacob; deceit, lies, jealousy, murder and so on are the order of the day. In fact, things have pretty well remained unchanged to this day and indeed the sons of Jacob are still fighting the sons of Ishmael and Esau. Simplistically put perhaps, but close enough.
So what is the book about? It is about the unchanging covenant love of God for His people, that He gives without reservation, even when they fall. But they don’t listen. In fact, right at the beginning we have a type of sacrifice in the murder of Abel, pointing to the Cross and the sacrifice of Jesus at the end.
In God’s plan, what happens in the beginning happens at the end. That’s right, nothing has changed, nor will it. If only people would listen.