1. Cold War
1.1. Bipolar World
1.1.1. USA
1.1.1.1. Capitalist World
1.1.2. Soviet Union
1.1.2.1. Communist world
1.1.3. Since 1949 USA and USSR are rivals
1.1.3.1. military superpower
1.1.4. They try to make others country join their cause
1.1.4.1. Warsaw Pact
1.1.4.2. OTAN
1.1.5. military influence is justified
1.1.5.1. both must defend their allies
1.1.6. weaken the enemy
1.1.6.1. many wars
1.1.6.1.1. Vietnam (1964-73)
1.1.6.1.2. Golf war(90-91)
1.1.6.1.3. Irak war (2003-11)
1.1.6.1.4. Afghanistan war (2001)
2. Multi-polar World
2.1. After the end of the Cold War
2.1.1. Cultural and military power
2.1.1.1. brasil
2.1.1.2. China
2.1.1.3. India
2.1.1.4. USA
2.1.1.5. Japan
2.1.1.6. Europe
2.1.1.7. Russia
3. World policeman now? Why?
3.1. America is still a superpower
3.1.1. political superpower
3.1.1.1. first economic and financial power
3.1.1.2. ONU co-founder
3.1.2. Cultural and military power
3.1.2.1. first arsenal of atomic weapon
3.1.2.2. Hollywood, technology, food...
3.2. USA has no mortal enemies
3.2.1. intervene only when it's necessary