| 23. | The break-up of the Soviet Union ended the Cold War and created challenges for its former allies, the former Soviet republics, Europe, the United States and the non-aligned world. |
| 24. | Regional and ethnic conflicts in the post-Cold War era have resulted in acts of terrorism, genocide and ethnic cleansing. |
| 25. | Political and cultural groups have struggled to achieve self-governance and self-determination. |
| 26. | Emerging economic powers and improvements in technology have created a more interdependent global economy. |
| 27. | Proliferation of nuclear weapons has created a challenge to world peace. |
| 28. | The rapid increase of global population, coupled with an increase in life expectancy and mass migrations have created societal and governmental challenges. |
| 29. | Environmental concerns, impacted by population growth and heightened by international competition for the world’s energy supplies, have resulted in a new environmental consciousness and a movement for the sustainability of the world’s resources. |