Deepening understanding of controversial and complex issues through P4C At DECSY most, if not all, of our curriculum development projects have P4C (Philosophy for Communities / Children) at their heart. DECSY supports teachers and other educators to implement education for a just and sustainable world. Global issues are both complex and controversial and so P4C methodologies are invaluable for exploring these. Nonviolent Action: A Force for Change is a four-year project, (now