Simplify the following text for a Grade 9 native English-speaking person.
Original: James Harold Wilson , Baron Wilson of Rievaulx , KG , OBE , FRS , PC ( 11 March 1916 â `` 24 May 1995 ) was one of the most prominent British politicians of the 20th century .
Simplified: James Harold Wilson , Baron Wilson of Rievaulx , KG , OBE , FRS , PC ( 11 March 1916 â `` 24 May 1995 ) was a British Labor politician .