Reason and Atomism

Perhaps Kant's primary contribution to the Rationalist tradition is his concept of Reason as intrinsically Universal, likely based on the equivalence of 'impersonal' and 'universal'.  Thus, the role of Reason in conduct becomes inherently social, e. g. the coordination of maxims with laws, whereas, for Aristotle and Spinoza it is only extrinsically interpersonal, while for Plato, Descartes, and Leibniz it remains an essentially private process.  In other words, the Kantian concept of Reason is anti-Atomistic, and anticipates the nascent Dialectical tradition of  Hegel, Marx, Fichte, etc.