[celtain]

Yes, people should absolutely feel a social obligation to make at least some concessions to the greater good.

While this isn't a complete substitute for regulations that systematically fix issues causes by negative externalities, I'd rather live in a society where a lot of problems are avoided because my fellow citizens generally care about my well being, rather than one in which the government needs to intervene left and right.

[seer-zig]

What do they do when the society around them doesn't care and is reckless? For example, because drinking is so ingrained in many societies today, you have to do what you can to protect yourself from drunk drives.