| Nationalism French revenge against Germany French desire for return of alliance and Lorraine Pan � slavism in Eastern Europe German pride in military power and industrial growth Serbian desire to created south Slav state Imperialism British concern over German growth British concern over German competition for colonies Economic rivalries between Britain Germany and France British and French desire to contain German territorial claims in Africa Militariam Military power seen as symbol of national prestige Glorification of war by all powers Arms race among great powers Influential military leaders Belief in social Darwinism Alliances Agreements among nations to aid each other if attacked Russian agreements with smaller Slavic nations Emergence of allies Emergence of central powers |