99 percent of human beings are intellectually shallow, dumb. Most people are creatures of habit, dependant upon a system that promises to satisfy their basic desires and because they are attached to these promises they are very resistant to the critical thinking required to accept radical changes in the system or the ideologies that are innate to the larger system.
Thus, the philosopher who is convinced of the necessity of change, must perform a very creative trick whereby he/she constructs an adequate means to ameliorate the injustices while providing a vision of the future that promises greater satisfactions of base desires.
All revolutions can be seen operating out of this 2 level approach to human progress. The angry or frustrated revolutionary is one who has refused to accept that part of human nature that is capable of living without rational consciousness, and makes a condemnation of those who merely encourage us to accept human nature. It takes courage to love human beings without expecting them to rise to some utopian notion of enlightenment, or creating a causality around the ignorance to forgive that which might be innate.
The failures of a society are the failures of that 1 percent to organize the potential energy found in the 99 percent who are capable of great obedience, as long as they are adequately inspired to change. This failure often comes about by the worst form of ignorance, which is the obstinate refusal to accept this dichotomy.