Biology, meaning the science of all life, is a late notion.
Our only responsibility is to live our own life and take care of our own children.
Genetics is crude, but neuroscience goes directly to work on the brain, and the mind follows.
If you have easy self-contentment, you might have a very, very cheap source of happiness.
Is it possible to covet a much longer life for one's self and be as devoted to the well-being of the next generation? It's a long argument.
The abortion controversy is important for what it says about our stance toward procreation and children altogether.