Summary: 1. Introduction. – 2. The role of the main civil society actors in crisis areas. – 2.1. The role of young people in preventing extremism and terrorism that leads to war through civil society. – 2.2. The role of women in preventing extremism and terrorism leading to war through civil society. – 3. Community representatives in the prevention of PETW. – 3.1. The role of educators and educational institutions in PETW. – 3.2. Law enforcement services, preventive measures, and community policing PETW. – 3.3. University staff and their role in PETW. – 3.4. The sector of information technology (IT) and social media in their role towards PETW. – 4. Analysis of the adequate possibility of success by civil society in preventing extreme wars. – 5. Partnerships for peace. – 6. Conclusions.