A good snapshot of the trend toward constructing tighter logic; however, heavily set toward proofs of God and his truths without a strong premise. More than anything, Leibniz shows a strong understanding of a wide subject matter, including philosophy, history, science, mathematics, and religion. He is a more practical philosopher than some of his contemporaries and gives a fair treatment of free will. He downplays Descartes in two places, once regarding the physics of velocity vs. momentum, and again in the matter of "efficient causes." In the latter, he argues that Descartes method was weaker because he never would have discovered the truth without Snell having done so first. ( )