In today's society, children are taught the difference between right and wrong through the consequences applied to their actions, not by the way their actions affect others around them. Although I am speaking specifically of society today, my theory has been proven again and again through the course of history.
In our era, the preferred method of teaching a child is, "Timmy, if you hit your brother, you'll get a time out." When, if society were rational, it would be, "Timmy, if you hit your brother, it will hurt him." …