From the introduction:
You cannot change anything, now, in the instant. You kick a garbage can over, someone will right it, put back it's contents, sooner or latter. That or if no one does, it probably means there are no humans there no more. There will be no resolving moment where a villain who represents all that is problematic and upon which all problems hinge, is murdered for a brighter future. There is no lynch pin. There is only human inertia. Like riding a shopping trolley down a hill, maybe you can kick and it'll drift the other way a little. That's what you get. No hero's with shining, perfect teeth making things better simply out of being alpha male or alpha female.