What major philosopher is the target of Voltaires satire when he talks about the best of all possible worlds? Who is this?

The
primary target of 'sinis the German philosopher Leibniz who claimed that our world is "the
best of all possible worlds". Leibniz argued that, in spite of its many imperfections, our
world must be the best of all possible worlds because it was created by an all knowing, all
powerful God who would not have tolerated anything less than the best possible world. Leibniz
claims that every other possible world that God could have created must have been worse, all
things considered, than our world. Fresh off the horrors of the Lisbon Earthquake in 1755 which
is thought to have killed as many as 100,000 people, Voltaire found Leibniz's argument pompous
and ridiculous and decided to demonstrate this ridiculousness through Candide. In the story,
Candide and his philosophical mentor Pangloss witness countless tragedies only to respond with
Leibnizian optimism that they live in the best of all possible worlds.