Simplify the following text for a Grade 10 native English-speaking person.
Original: Mary Wollstonecraft ( ; 27 April 1759 â `` 10 September 1797 ) was an eighteenth-century British writer , philosopher , and advocate of women 's rights .
Simplified: Mary Wollstonecraft ( 27 April 1759 â `` 10 September 1797 ) was an English philosopher and early feminist .