In parts of africa, drought and over-farming have brought about the

the geography of greece

led to limited interactions with other cultures in the mediterranean

was rich in natural resources and led to repeated invasions from the macedonians

encouraged greater contact with peoples on the southern and eastern mediterranean coasts

caused the greeks to eventually relocate eastward under alexander the great

the speech convinced americans that the ussr was an enemy, rather than an ally, which led to the creation of the truman doctrine.