It comes from common sense. Life just tends to be easier if you follow the basic moral rules. You’ve got less to hide, you’ve got better friends, you face fewer consequences, you function better in society which makes society more useful to you.
If you look at Western history and how morality has changed over the course of it even supposedly God based morality is demonstrably NOT objective. We’re constantly tweaking things, even on what would seem to be the clear and easy ones like murder we’re always expanding or contracting the definition (usually expanding, which is probably a good thing). We’re a subjective species, we’ve been gifted with the ability to rationalize, which brings with it the ability to say “well that’s not really murder”.
We’re a subjective species, we’ve been gifted with the ability to rationalize, which brings with it the ability to say “well that’s not really murder
I can’t disagree more.
Ability to rationalize, YES.
But subjective?
No way.