Here is a second and important surprising truth about ethics:
Technology can undermine ethics. Our ethical instincts arose to help us cooperate in hunter-gatherer groups. When you did something that hurt another member of the group, you were to feel some of that hurt yourself – conscience. But these ethical instincts work best when you are forced to directly experience the consequences of your actions. Today technology enables us to do harm at a great distance and essentially anonymously. Consider the taunts and lies promulgated via social media just because they can be delivered anonymously. One reason that drone warfare worries us is that it detaches the act of killing from any experience of it. Our technological reach has outdistanced our ethical reach.