Explain how social categories, rules, and practices changed with the arrival of Spanish and Portuguese colonist in the 1450-1750 time period.

In the previous era (600-1450 C.E.), sometimes called the post-classical period, we explored the rise of new civilizations in both hemispheres, the spread of major religions that created cultural areas for analysis, and an expansion of long-distance trade to include European and African kingdoms. However, no sustained contact occurred between the eastern and western hemisphere. During the time period between 1450 and 1750 C.E., the two hemispheres were linked and for the first time in world history, long-distance trade became truly worldwide.

to contain the wave of communism

in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.