Regarding what is enough, it's like Sisyphus' effort on pushing the rock to the top. It's never about the result, it's about the process and dedication.
If you looking at it from the top, everything would seems like putting salt to the ocean, what ever we do, it would seems like it never make the ocean "saltier".
But look at it from the bottom, from the close sight, surely what you do would form a story that have impact to some people, some community, some region.
Why talking about Anarchy where the community can take care of themselves without the existence of government and its apparatus? Why not just start ignoring the government and do what we think is right and what we can do, perhaps if there are enough people doing what is right and necessary, eventually the right people from the bottom would come up to the top. Sometime I see our government is the very reflection of the smallest part of our organization, fixing the bottom would eventually affect the top also.
But hey that's just me.