Because human beings are complex, social creatures with a range of biological outcomes. If you want to be the chief monkey, you have to keep all the other monke

Because human beings are complex, social creatures with a range of biological outcomes. If you want to be the chief monkey, you have to keep all the other monkeys safe, healthy, and happy. Otherwise they'll bash your head in and pick a new chief monkey. We can postulate all sorts of modern scenarios and ethics and laws and rights on top of that, but at the end of the day, if you want to have a society, everyone in it needs to be taken care of according to their own needs. Leave too many people behind and there will be upheaval. Alternately, we could not have a society, but then there are no business owners in that scenario.