Was the fifteenth amendment needed to protect the rights of citizens? provide support for your conclusions.

Asap how do you think the current presidency has impacted our economic system in america?

"if i have seen farther than others," said newton, "it is because i have stood on the shoulders of giants." who were the giants to whom newton was referring? could this be said of any scientific accomplishment? explain.

In general which explains why communist revolutions did not happen