Here's a reason why: Africans were strangers to the Americans. Because the Africans were poor, they didn't have any allies to watch out for them or to protect them.
It was successful because when all blacks boycotted the buses, that takes a huge chunk of change out of the cities bus money which was a staple in how the city lived. Don't quote me on that though. Sorry it took someone 2 hours to respond to your question. Hope I helped :D
The french fleet cut off the British from retreating Yorktown by sea.
This is because Hinduism was highly associated with the Caste System which was a social structure which India adhered to prior to its abolition. It states that the higher your caste, the more likely you are to be able to achieve moksha. If you are in a lower caste, it is because you recieved bad karma in your previous life.