an issue that citizens care about and rally around
tero bau
Externalities can cause market failure if the full social costs and social benefits of production and consumption are not taken into account.
I think you mean "does social networking cause a decrease in school grades?" If it does you clearly shouldn't use any.
Depression and lack of social activity
yes
to change social patterns that cause inequality (APEX)
It is the cause of a lot of them, but not all, as the love of money is still worse!
Moving cause of religion, or i think maybe cause somebody has trouble socially??
the people lack of education
Slavery
no friends
cause it related to pschology