To try to turn their members into hardened revolutionaries and to promote solidarity and cohesion, members of collectives engaged in intensive criticism sessions which attempted to reconcile their prior and current activities to Weathermen doctrine. These "criticism self-criticism" sessions (also called "CSC" or "Weatherfries") were the most distressing part of life in the collective. Derived from Maoist techniques, it was intended to root out racist, individualist and chauvinist tendencies within group members.