They include religious intolerance, racism, cultural differences, differing ideologies (such as Communism and capitalism), nationalism and the doctrine of national sovereignty, economic conditions, and a popular acceptance of militarism.
एनसाइक्लोपीडिया अमेरिकाना (अंग्रेज़ी) मानव समाज के कुछ पहलू बताती है जो इतिहास में युद्ध का कारण बने हैं ।