That's a central part of philosophy, of ethics. What do I owe to strangers? What do I owe to my family? What is it to live a good life? Those are questions which we face as individuals. ↗
Suddenly you're surrounded by strangers who want something from you. The thing is, they don't know what they want, and you don't know what they want, unless it's an autograph, and you just sort of stand there grinning at one another. ↗
If these men decided that they have to go in there and fight, I want them to send their own children and grandchildren. I want them to not send a bunch of strangers' kids in there to fight and die. ↗
It's also selfish because it makes you feel good when you help others. I've been helped by acts of kindness from strangers. That's why we're here, after all, to help others. ↗