In which language were most book written before the renaissance

Most books in Europe were written in Latin. There were numerousbooks in the Arab World and in China that were written in otherlanguages.

during the 20th century, the role of the vice president has evolved into more of an executive branch position. now, the vice president is usually seen as an integral part of a president's administration and presides over the senate only on ceremonial occasions or when a tie-breaking vote may be needed.