It's like ancaps think that valuing your neighbor's life as much as your own or your kid's(or even their next meal) is some emergent human property.
Altruism is found in nature, particularly among genetically related individuals. Culture is at least as important to humans as genetics, so if your neighbor holds similar values /1
Oh and your neighbor aren't enough to defend a border. And if you're forced to choose between your neighbor's or your kid's life, who's do you choose? This is anarchy after all.
***You and your neighbor***
