As most mothers and teachers will know - expectation is everything. The other noticeable difference between kids from easy backgrounds and those who've been dealt some hard cards is that in "tough kids" there is a constant static which goes on in their brain.
Half the time they are "not listening", not because they are wilfully disrespectful or rude, but because they just can't hear for what is going on in their own heads. They have a radar which is attuned to protecting themselves from harm. They are constantly filtering the immediate environment for potential risk, which also prevents them from taking in the extraneous information that a mainstream education provides. They become risk averse to offering an opinion or engaging because they are afraid of what the price may be for doing so. And so they disengage.
That cognitive load is taken off those students who have never had to keep a weather eye out for acts of random violence or a shifting environment. Fear can be as massive an inhibitor to growth as malnutrition or lack of resources.
I believe communities can develop the same negative traits and it can be bad for good growth and development in much the same way. If you live in a small town and are afraid to send someone or something up, you don't want to engage in a political conversation for fear of losing your job or you do not wish to be seen to be taking sides because of what that might do to your business - you are operating out of fear.
The economy and community is also unlikely to be dynamic or creative. If you are worn down by the status quo and don't wish to vote you are operating out of a deficit model. You're thinking "this is as good as it gets" when what you need to ask is: "Is this really good enough?"