Some of the peoples it conquered didn't want to be ruled by the Incas and were rebellious, mainly, and it was so big that it couldn't keep the conquered in line very well.
Answer:
Emmett Till's murder was such a spark in the civil rights movement because there was proof that Emmett was not guilty of what the people accused him of, he was only 14 years old at the time of his death and because the people that killed him admitted in a national newspaper that they killed him and were still found not guilty.
Answer:
The were immigrants often forced to take low-paying industrial jobs in cities in the late 1880s because immigrants lacked the skills needed to obtain higher-paying jobs.