Answer:
The Compromise of 1850 included the Fugitive Slave Act, which became largely disputed within the northern free states. The Fugitive Slave Act stipulated that citizens of free states were required to return slaves found in the North. ... After the Act was passed many African Americans in the North fled to Canada.
Sometime between 30 and 33 A.D
The Catholic Church suppressed many ideas of the Scientific Revolution and they even excommunicated Galileo for saying that the earth revolved around the sun
Aristocrats wanted to retain their power and wealth by taxing the people and the philosophers wanted to establish democracies that would give more power and wealth to the people. Basically the condition of the life of the people was so bad compared to the decadence of the aristocrats that revolution was inevitable.