I’ve never been a supporter of capital punishment, so I was glad to see God simply banish Cain. But I had to wonder, what about ‘an eye for an eye, tooth for a tooth’? That concept is introduced a little later. First, God has something really, really BIG planned.
Before we talk about Noah… a lot of time passes since Cain killed Abel (until the flood, people enjoyed a nearly 1000 year life-span) and the human population grows rapidly. Cain has kids and his great-great-great-grandson is named Lamech.