How Are We to Live

As Peter Singer wrote, "The problem is that most people have only the vaguest idea of what it might be to lead an ethical life. They understand ethics as a system of rules forbidding us to do things. They do not grasp it as a basis for thinking about how we are to live. They live largely self-interested lives, not because they were born selfish, but because the alternatives seem awkward, embarrassing, or just plain pointless. They cannot see any way of making an impact on the world, and if they could, why should they bother?