is the best but I find that kids come to school pretty firmly rooted in greed, for lack of a better word.  Now, some of that is attributable to age: kids are narcissistic by nature.  Still, if they have never been expected to defer to another human being or to share anything, they are scarred before we get them.  They come from homes where if they don't speak up and fight for everything, they get nothing.  

I don't know how we got here but there must be some way to teach/encourage parents and caretakers to instill some humanity in kids while they are young.  I hate it when I only have questions instead of answers........

BTW  I teach in a Catholic school so I do have the advantage of asking them, "Is that how you treat God's child?" It doesn't always work, but it certainly gets their attention!