They're the rudiments of morality. They're the impulses that were the origins for moral codes. Mix in a bit of overcrowding and free time and you get all the common and diverse moral codes we have today.
I agree, Walt. I once got caught up in the tangled jungle of technical questions and realized that the only thing that was solid is if we leave this fertilized cell alone it will continue to develop through time to become a senior citizen. The second we destroy it, or nature itself ends it, it is no longer “living” at whatever stage it’s in and the development process is over.