This book provides a comprehensive account of Kant’s development from the 1755/56 metaphysics to the cosmological antinomy of 1781. With the Theory of the Heavens (1755) and the Physical Monadology (1756), the young Kant had presented an ambitious approach to physical cosmology based on an atomistic theory of matter, which contributed to the foundations of an all-encompassing system of metaphysics. Why did he abandon this system in favor of his critical view that cosmology runs into an antinomy, according to the Critique of Pure Reason (CPR)? This book answers this...