Carl von Clausewitz (1780–1831) was a Prussian general and military theorist who is most famous for his book "On War" (Vom Kriege). A product of both the Enlightenment and the experiences from the Napoleonic Wars, Clausewitz's work delves into the theory and philosophy of war. His thesis posits that war is an extension of politics by other means and emphasizes the complex and unpredictable nature of military conflict. Clausewitz's ideas about the strategic, operational, and tactical aspects of warfare, including the famous concept of the "fog of war," have had a profound and lasting impact on military strategy and theory, influencing thinkers, military leaders, and policymakers well into the 21st century.