Problem
Explain how Leibniz argues from the principle of sufficient reason to the conclusion that the our world (i.e., the world that actually exists) is the best possible world. What is it about our world that makes it the 'best possible' one?
Leibniz claims that substances don't causally interact with each other (they are 'windowless'). So, on his view what does cause the changes that occur in substances? And why does it seem like those changes are being caused by other substances?