From "Invasions and Evasions" in Hegemony or Survival, page 121.
"Tinkering, .... is a preliminary to large-scale change. There can't be large-scale structural change unless a very substantial part of the population is deeply committed to it. It's going to have to come from the organized efforts of a dedicated population. That won't happen, and shouldn't happen, unless people perceive that reform efforts, the tinkering, are running into barriers that cannot be overcome without institutional change. Then you get pressure for institutional change. But short of that realization, there is no reason why people should take the risks, make the effort, or face the uncertainty and the punishment that's involved in serious change. That's why every serious revolutionary is a reformist. If you're a serious revolutionary, you don't want a coup. You want changes to come from below, from the organized population. But why should people be willing to undertake what's involved in serious institutional change unless they think that the institutions don't permit them to achieve just and proper goals?"