This sculpture in the memory is not without preestablished harmony
Unlike Wolff, Baumgarten embraces Leibniz's monadology and the doctrine of preestablished harmony
(for Wolff only a "hypothesis").
Leibniz's answer is that there is a preestablished harmony between your worldly experience, my experience, and the experience of the innumerable monadic others--a harmony established by the Supreme Monad and Grand Mediator or Go-Between, God.
However, beyond more subtle philosophic objections, for those not enamored by the idea of this best of all logically possible gods, this preestablished harmony of isolated immortals seems an extreme metaphysical fudge--a travesty of our sense of finitude, mortality, and dynamic implication in the world.
This "from the ground up" approach can ease much of the anxiety produced either by the Platonic assumption that one's life is not conforming to a preestablished harmony
or by the hedonist assumption that one is not particularly adept at calculating the play of pleasure and pain.
Manfred Kuehn outlines the intellectual situation at Konigsberg at the end of Kant's schooling, with focus on competing accounts of relations among substances--real change physical influx, occasionalism, and universal harmony--arguing centrally that Kant's Thoughts on the True Estimation of Living Forces was an act of rebellion (not discipleship) against Martin Knutzen, leader of the dominating, anti-Wolffian Pietists, who argued for the sufficiency of influx (aligned with Locke and the Aristotelian tradition) and the dangers of preestablished harmony
(especially its alleged conflict with free will).
Most of the essays discuss the development of occasionalism and preestablished harmony in major seventeenth-century thinkers and how these theories emerge from the background Cartesian metaphysics, mechanistic physics, revealed theology, and traditional philosophy.
The essays on Leibniz are all interesting, but they tend to approach preestablished harmony and other Leibnizian doctrines from divergent points of view.
The essays of Eileen O'Neill and Margaret Wilson are on topics outside, the scope of occasionalism and preestablished harmony.
Yolton's sketch begins with the characterization of the so-called three hypotheses, namely the systems of physical influx, occasionalism, and preestablished harmony