I can provide a counter example against theories of kin selection and the idea we are disposed to help people closely related to us genetically.
The counter example is World War one and World war two. Millions of people people laid down their lives for nationalist interests. People fought on behalf of other countries and peoples.
The UK joined the first war on behalf of Belgium and because the British had an Empire soldiers from places as far a field as India and other countries with very different races/ethnicities fought for Britain. Both wars and the later Cold War had a suicidal quality.
Do not let the oppressed retreat in disgrace; may the poor and needy praise your name..