The reformation caused the splitting between catholics and protestants. The reformation is also commonly called a schism (and is one of a few schisms that have happened in the history of the christianity).
With the demands of Martin Luther being published, more and more followers found this view of christianity more appealing compared to the one that was present at the time.
This split between protestants and catholics also lead to the Thirty Years' War between 1618 and 1648.
<u>U</u>niting the Ottoman Empire under an <span>efficient government structure" would be the best answer, but of course this is a slightly objective question and answer.</span>
He was the first European to discover America, or at least what Europe knew of. Before he discovered it Europe had no knowledge of it existing.America was discovered before by Vikings, by Leif Ericson, but their settlement didn't last that long. Columbus was the first to go to America and maintain contact with the continent and colonize it,having big impact in history. That's why it is better to say - to avoid discussions - that he re-discovered itw