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Defend Earth from alien invaders
The political term used when referring to the fragmentation or breakup of a region or country into smaller regions or countries. The term comes from the Balkan wars, where the country of Yugoslavia was broken up in to six countries between 1989 and 1992. It was the effect of the Balkan wars.
suitable for agriculture
A social structure in which classes are determined by heredity
Central Business District
Commercial heart of a city
a geographical feature on land such as a valley, defile or a bridge, or at sea such as a straight which an armed force is forced to pass, therefore greatly decreasing its combat, in order to reach its objective.
The spread of ideas, customs, and technologies from one people to another
large corporations that have operations in several countries
A social division based on national origin, religion, language, and often race.
A state that no longer exists or one in which the government is so weak that it has little control over its territory
a geographical area of fertile land in the Middle East stretching in a broad semicircle from the Nile to the Tigris and Euphrates
a society which consists of several distinct cultures and groups
refers to the highly industrialized economies of Hong Kong, South Korea, Singapore, and Taiwan.
Damage to or destruction of the natural environment
the rapid spread of a disease among many people
The total number of people divided by the total land area.
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