If you "bring down the current system", do you think what results is going to be less destructive to the environment? Or will 8 billion people all do whatever

If you "bring down the current system", do you think what results is going to be less destructive to the environment? Or will 8 billion people all do whatever they have to in order to survive, regardless of the damage it causes? You have to have a realistic replacement for the current system, and a realistic plan to get there. Without that, bringing down the current system won't lead to something better, but to something worse.