"Temporarily closing off the streets during direct actions does provide momentary spaces in which to practice democratic process, and even offers a sense of empowerment, but such events leave power for power's sake, like the very pavement beneath our feet, unchanged. Only when the serial protest mode is escalated into a struggle for popular or horizontal power can we create cracks in the figurative concrete, thereby opening up ways to challenge capitalism, nation-states, and other systems of domination."