'Limit the range of the debate...'

"The smart way to keep people passive and obedient is to strictly limit the spectrum of acceptable opinion, but allow very lively debate within that spectrum. That gives people the sense that there's free thinking going on, while all the time the presuppositions of the system are being reinforced by the limits put on the range of the debate."

          ~ Noam Chomsky, from his book How the World Works

[Hat tip Philo Thoughts]