How Little We've Come

It amazes me how little the human condition changes over time. Take for instance Rahm Emanuel's recent gaff when he used the word retarded. I remember kids on the playground using this to pick on other kids years ago when I was young, and yet it is still in use today. Surely we have better adjectives in our vocabulary that will get across our meaning without singling out a sector of society. What ever happened to "If you can't say something good about someone, don't say anything?" Can't we all accept each other and welcome their diversity as a possible asset, rather than seek ways to tear each other down? What say you?