The colonists were killed by Native Americans or hostile Spaniards
Agriculture plays a crucial role in the rise and development of civilizations, since it allows for there to be a "food surplus"--meaning that people other than farmers can spend time and effort developing new skills and practicing new trades.
The biggest issue is by technology.
Explanation:
In this unit, you studied World War I and World War II. Both of these wars had devastating effects on the nations that were involved in the war. What were some of the peacekeeping measures that were taken after each conflict to prevent future wars? How successful were these measures? Do you think another world war could ever take place again? Why or why not?
