Different people have irresolvably different views of the good life — not only at different periods of history and in different forms of society, but… - J. L. Mackie

Men...are almost always concerned more with their selfish ends than with helping one another. The function of morality is primarily to counteract this limitation of men's sympathies. We can decide what the content of morality must be by inquiring how this can best be done.

Each individual is linked not only to his biological ancestors but also to traditions of activity and information and thought and belief and value; nearly all of what anyone most distinctively and independently is he owes to many others. The taking over and passing on — with perhaps some changes — of a cultural inheritance is itself a part of the good life, and this too is a social relation to which there belong appropriate sorts of conflict as well as cooperation.

Morality is not to be discovered but to be made: we have to decide what moral views to adopt, what moral stands to take.