Voltaire also wrote Candide at least in part to discredit Leibniz 's claim to having discovered calculus and Leibniz 's charge that Newton 's theory of universal gravitation was incorrect .
Voltaire is an admirer of Newton .
Voltaire , an admirer of Newton , also wrote Candide at least in part to discredit Leibniz 's claim to having discovered calculus and Leibniz 's charge that Newton 's theory of universal gravitation was incorrect .