Simplify the following text for a Grade 9 native English-speaking person.
Original: Bruno Bauer ( September 6 , 1809 â `` April 13 , 1882 ) was a German nihilist , philosopher and historian .
Simplified: Bruno Bauer ( September 6 , 1809 â `` April 13 , 1882 ) was a German philosoper and theologian .