Sharing nicely is a good rule... But, where do you draw the line between too much sharing and too little? Communist Russia took 'sharing' to violent extremes. At the other end of the scale are oligarchic regimes where there's no sharing, not really. So, where do you draw the line?

(Russia is the most extreme example I can think of. Also, I'm not saying that Russia didn't end up an oligarchy - but it started out with communist ideology)

/devil's advocate.

I propose 'Do unto others as you'd want them to do unto you' as a semantic refinement of your proposal :-).