What made john d. rockefeller such a great businessman

States' compliance with the native american reservation treaties drawn up by the federal government for the native american nations is:

"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.

After the civil war which president was called a "carpetbagger"?