Moving on with my historical survey of philosophers from the past, I first take a look at the original ontological argument as laid out by the 11th cenutry philsopher St. Anselm.  Then, I get into a series on Faith & Reason and the question of what one ought to do when one thinks that the arguments both for and against the existence of God are unpersuasive; here we look at the Atheist Michael Scriven who argues for a Presumption of Atheism and Blaise Pascal who argues one would be prudent to believe in Theism via his famous Pascal's Wager argument from expected utility.