Marcusa's Solution to the World's Problems

Marcusa says that you never implement by force some sort of sweeping chan like this. The worst thing you could ever do is throw out capitalism to day and implement marxism to morrow. He's actually highly critical of people that try to force a marxist revolution in a country that's not currently in a state of revolution or pre revolution. Do we have a moral imperative to stand against the systems that dominate and repress people? How much suffering is being caused world wide? Are ther particular genders and races that have been historically repressed for the sake of society more than others?