Why be good?

[robvalue]

Even if you have no empathy, it shouldn't take long to realise that acting like a dickwad will cause you trouble. If you keep throwing bricks through your neigbour's window, they're going to retaliate or call the police. And if you ever need help from them, they'll tell you to fuck off.

So it makes life better and easier to be nice rather than cause trouble. You could do neither, don't help people but don't hurt them, of course. But again you'll find if you never help anyone, they'll be less inclined to help you when you need it.

This isn't why I help people and don't hurt them, in order to make my life better, that is a side effect that even sociopaths can benefit from. The reason is I want everyone to be happy as much as possible. Everyone else only has one life (that we're sure of) just like me, so I want those lives to be as pleasant as possible.