What was a problem with the Line of Demarcation, and why might it be considered arrogant to do what Spain and Portugal did?

What was the focus of the stanford study-pls

In ohio in 1872, the cleveland massacre was a violent labor dispute at standard oil refineries in cleveland. a takeover by standard oil of the refineries in cleveland. an attempt to stop standard oil from becoming a monopoly. a failed attempt by standard oil to take over other refineries.

What explains the political difference among african americans politicians during reconstruction