While many forms of altruism divide us up into helpers and helpees, radical action gets to the 'root' of systemic problems by creating solutions that target the underlying structures that set up those distinctions in the first place.
All at once.
Many organized efforts are focused on one particular issue, such as social justice or sustainability, but really creative actions integrate multiple domains and levels of impact by recognizing the inseparability of the problems we face.
It's just us.
Although some people have exceptional talents and resources at their disposal to effect social change, civic participation is not relegated to unique individuals. Whatever your current station in life, you have a crucial role to play that no one else can.
Rewiring a bankrupt system may meet with resistance, both from within and without, and so we must be prepared to overcome those obstacles. Collective actions have the capacity to bend and even break systems of power.