Our world seems fine tuned in life-permitting ways. If the cosmos contains many universes, only the appropriately tuned ones can be seen by living beings. An alternative is that God acted as Fine Tuner. We might account for God in terms of an eternally powerful ethical requirement that God exists, rejecting J. L. Mackie's judgment that absolute ethical requirements are incredibly queer. Mackie viewed such requirements as logically possible, so if they were absent then this would seem a matter of synthetic necessity. Again, if they existed then their creative effectiveness would, Mackie thought, be logically possible. Their actual ineffectiveness would thus involve a further synthetic necessity. Theists could maintain that the synthetic necessities were instead ones making ethical requirements real and creatively powerful. Yet why, then, would there exist anything but divine knowledge of everything worth knowing? A spinozistic answer is that such knowledge is all that exists.