Actually... Dawkins got one thing slightly wrong (well, those philosophers did at any rate
). Things can only be proved by logic, and mathematics are some of the absolute BEST proofs in existence. What philosophy accomplishes that mathematics doesn't: is to answer why, or more often why not.
Those influential philosophers probably aren't existentialists.

Those influential philosophers probably aren't existentialists.

Please give me a home where cloud buffalo roam
Where the dear and the strangers can play
Where sometimes is heard a discouraging word
But the skies are not stormy all day