My justification is pretty simple:
I like being happy and not having malaria and eating food.
I appear to be fundamentally similar to other people.
Therefore, other people probably want to be happy and not have malaria and have food to eat.
I don’t appear to be special, so my interests shouldn’t be prioritized more than my fair share.
Therefore I should help other people more than I help myself because there are more of them and they need more help.
My justification is pretty simple:
I like being happy and not having malaria and eating food.
I appear to be fundamentally similar to other people.
Therefore, other people probably want to be happy and not have malaria and have food to eat.
I don’t appear to be special, so my interests shouldn’t be prioritized more than my fair share.
Therefore I should help other people more than I help myself because there are more of them and they need more help.