Crossword puzzle clue "20th century french philosopher and novelist"

20th century French philosopher and novelist

Noted 20th-century mathematician, philosopher and pacifist

20th-century novelist who shared first and middle names with poet Emerson

Early 20th-century novelist Fannie

Rodent named for a 20th-century novelist?

...for an early 20th-century British novelist?

Early 20th-century French writer Jean, who said "A man must dream a long time in order to act with grandeur, and dreaming is nursed in darkness"

20th-century French leader