The early people of the Southwest cultivated crops and built dams and ditches to irrigate fields. Unlike the Southwest's farming western climate, the Mississippi River valley has a humid and temperature climate.
Well it had more to do with geographic wonders. Rivers in the area meant fertile soil and reliable water sources. This encouraged people to settle in Mesopotamia and eventually start city-states.
Answer:
Explanation:
Natural fortifications also helps defend a country. For example the Alps in Italy defends them very well. Rivers can also be a defensive position a country can fall back to. So no, fortifications and defenses arent the only thing. Nature is able to help too.
Most had psychiatric symptoms, these ranged from difficulty sleeping to vivid flashbacks, and are now recognized as Post Traumatic Stress Disorder (PTSD).
