1) I'd like to think I'm quite altruistic. In theory, I think if you can save someone easily with no risk to your own, or other's lives, and you don't try to save them, it's the same as murder, but at the same time, I understand in practice, it's probabally quite different.
2) Sorry to be pessimistic, but I don't think so. Look at the world. So much is so wrong. People are waging wars over matters of opinion, people are dying, starving, merely because they don't have enough money to pay for what they need to stay alive. Hell, not even on that scale. Ever noticed how messed up the employment system is? When you fill in an application form, and it says "why do you want to work for the company?" most people's true answer would be "Money", nothing wrong with that, gotta have money to live, gotta work for money. What's wrong, is that to stand a decent chance, you must lie and say you are really interested in spending the rest of your days working at a supermarket, and of course, if you do get through to interviews, then the lies just get deeper. The curious thing is, I'm sure employers know people lie, and yet those questions still go on the application form. This suggests, that maybe employers, to a certain extent, simply prefer those who find lying easy. Maybe so they can lie about the quality of a product, or so on. I don't know about you, but I find that slightly disgusting, disturbing even, that such a basic moral value as honesty has become of such little importance that it can even be a hinderance.
3) I quite frankly don't know.