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The concept of dialectics was given new life at the start of the 19th century by Georg Wilhelm Friedrich Hegel ( following Johann Gottlieb Fichte ) , whose dialectical model of nature and of history made dialectic a fundamental aspect of the nature of reality ( instead of regarding the contradictions into which dialectics leads as a sign of the sterility of the dialectical method , as the 18th - century philosopher Immanuel Kant tended to do in his " Critique of Pure Reason " ) .
 Georg Wilhelm Friedrich Hegel, Johann Gottlieb Fichte, Immanuel Kant, Critique of Pure Reason
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 Georg Wilhelm Friedrich Hegel, Johann Gottlieb Fichte, Immanuel Kant, Critique of Pure Reason