Simplify the following text for a Grade 11 native English-speaking person.
Original: Epicurus ( , `` ally , comrade '' ; 341 BCE â `` 270 BCE ) was an ancient Greek philosopher and the founder of the school of philosophy called Epicureanism .
Simplified: Epicurus ( Samos , 341 BC -- Athens , 270 BC ) was an ancient Greek philosopher , and the founder of a school of philosophy called Epicureanism .