<span>The first four civilizations arose in river valleys that made irrigation, and, hence,</span><span> ...</span><span>Bands of hunter gatherers, significant equality between sexes</span><span> ... </span><span>The Neolithic Revolution</span><span> ... </span><span>Agriculture freed up labor, metal-working one such result</span><span> ..... </span><span>The narrower view suggests that the chief difference between civilizations and other
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The Nazi-Soviet Pact was formed when Hitler wanted the USSR to help invade Poland for a truce. However it was very obvious that Hitler intended to keep his promise.
Portuguese colonization in the 1400s inaugurated an era of aggressive European expansion across the Atlantic. The Spanish, threatened by the Portuguese monopoly on enslaved Africans and expansion in the Atlantic, started their own colonization project with Christopher Columbus in 1492
It's too dry to grow crops. People in these regions have become nomadic herders and they must move their herds to find water and grass. The people also might have to adjust to find ways to get water such as developing an irrigation system.
