Answer:
The primary cause for the collapse of the Zhou dynasty was the implementation of the fengjian system, where the royal family would strengthen their authority over the other states by installing relatives as lords in the regions.
The Zhou system was unstable, having to deal with chronic warfare between the various substrates and outsiders. Over the centuries, larger substates conquered smaller ones. The worst warfare occurred during the Era of the Warring States, beginning around 500 C.E. Local dukes ignored the Zhou king and fought among themselves for supremacy. The last of the Zhou states were eventually conquered by the Qin in 221 C.E.
The brain. Modern homo sapiens such as humans have much larger brain than the early homo sapiens due to the fact that food at the time was becoming scarce so the need for the homo sapiens to become smarter was a necessity. And because of this early homisapiens brains evolved to become much larger than what they were before
C.European ideals have influenced american political culture
On August 3, 1492 Christopher Columbus Started working his way to the US by boat. It took three months to reach the shore of the bahamas. Originally he was trying to sail to Asia. Eventually they settled and many other europeans came to explore and settled and also, Conquered the Americans over the course of 300 years
Immigrants competed with native born americans for jobs
