The interesting thing here is how many of you are saying life wouldn't be worth living if you had to make the sacrifices that would be required of you to do so. You're exactly the people who wouldn't make it in the first place. Religious beliefs, morality, all of that stuff is based on nothing more than opinion in the first place. Opinions don't matter. Facts do. The fact is, mother nature did not invent religion. Humans did. Mother nature did not make a declaration that the weak needed to be protected. In fact, the natural course of things is that the weak die and make room for the strong. Morality is not a natural aspect of life. It is taught.
Let's just take Amber's response.
Let's assume for a moment, in this hypothetical situation, it's you, your three children who are 8 (Timmy), 6 (Jimmy), and 2 (Jenny), an old couple, the man doesn't get around well and wears glasses, the woman is overweight, and me. We've got, whatever we can carry. I'm the one carrying the heavy load. We've had to withdraw from whatever medium sized town we live in to a less densely populated area, a trailer park, for example, because we need supplies that are relatively easy to access, without many around us, and we need to avoid places that have already been picked to death by others. Let's also, for the sake of argument, assume this is a Zombie survival.
Jenny wants her daddy, who got gnawed to death three nights ago after sacrificing himself so you and your children could get away. You've had to abandon your vehicle due to road congestion and clutter. Jimmy is suffering from PTSD because he's seen the whole thing and his mind can't grasp it. Timmy wants to be brave. The older couple is cold, hungry, and the man's hip is bothering him, slowing him down even more.
We've hunkered down inside a missing Redneck's trailer. He happened to have a few supplies, but his best supplies were his makeshift set of tools, his busted up 4 x 4, and some canned food. There was a .38 revolver and a half box of shells that was left behind, a shotgun with no ammo, and a 22 rifle with all the bullets anyone would need. He clearly was smart enough to leave the low capacity revolver and low damage .22 behind. Because he had paid his bills, the electric and water are still on (as there was nobody at the utility companies there to press the button that shuts them off).
Aside from me, you are the only one who is remotely combat effective. 2 out of 7. Nobody in this group is a threat to me, even if they wanted to be, except, because I am slowed down and concerned with everyone else's well being, thanks to your sense of morality, which, on a subconscious level, part of me wants to believe. I am not, after all, a monster. However, you know in your heart, first chance I get, I'm gone and not looking back. Without me and/or an immediate replacement, your odds go down dramatically.
Now, we haven't explored the whole trailer park. We've only secured the one trailer for ourselves for the night. It's roughly 3:30 in the morning. The redneck who lived here just rolled up to the place with a couple of his redneck buddies, armed to the teeth with shotguns, spotlights, beer, a couple of pistols, and one of them has an assault rifle. They also have an SUV. The redneck who lived here knows something is up because the place has been tampered with. His door is also locked. Now he knows for sure someone is in there. One way or another, he's getting inside. We can't trust them. You're a pretty lady, and the only one that isn't a zombie for miles. I've got supplies they want, like extra ammo for a shotgun, for starters. Now, it gets worse. Jenny starts crying because of the ruckus. Jimmy huddles up and covers his ears. You're desperately trying to protect your kids. There's 3 of them. At least. I might be able to take them, but as soon as they realize they can shoot through the tinfoil hut, we're even more screwed. It gets even worse. The ruckus has got the attention of every zombie in the immediate vicinity. Surrender is not an option, especially if we started shooting first. Or they started shooting. That will end up with us losing our gear and being sent moving again. I -might- make it due to my own survival instinct. The older couple won't, and your children are your liability. You'll have to cave, more or less, and do what they want, and at every opportunity your children will be used against you.
Congratulations. Your morality has just gotten us all killed, even though it seemed like a good idea at the time.
That is why, in order to survive a situation like that, I will leave the women and children, elderly, sick, injured, whatever, behind. It is also why I will completely disregard any sense of morality. Those who travel with me are those who can keep up, who have no attachments that will get their brain in a bind, and who possess useful skills I need. You say what's the point of living such a bleak life? I say you have to make the sacrifice so you can have a life when it's over.
Anyway... I went on for too long again. Like I said, this is an interesting topic for me. I really can go on and on and on.