Karl Leonhard Reinhold

Karl Leonhard Reinhold (born 26 October 1757 – died 10 April 1823) was an Austrian philosopher who helped to popularise the work of Immanuel Kant in the late 18th century. His "elementary philosophy" (Elementarphilosophie) also influenced German idealism, notably Johann Gottlieb Fichte, as a critical system grounded in a fundamental first principle.