who coined the political philosophy the end justifies the means
Consequentialism The phrase and concept of "The end justifies the means" are at least as old as the first century BC. Ovid wrote in his Heroides that Exitus acta probat "The result justifies the deed".
Carl von Clausewitz Clausewitz's thinking is often described as Hegelian because of his dialectical method; but, although he was probably personally acquainted with Hegel, there remains debate as to whether or not Clausewitz was in fact influenced by him.[2]:183â€“232 He stressed the dialectical interaction of diverse factors, noting how unexpected developments unfolding under the "fog of war" (i.e., in the face of incomplete, dubious, and often completely erroneous information and high levels of fear, doubt, and excitement) call for rapid decisions by alert commanders. He saw history as a vital check on erudite abstractions that did not accord with experience. In contrast to the early work of Antoine-Henri Jomini, he argued that war could not be quantified or reduced to mapwork, geometry, and graphs. Clausewitz had many aphorisms, of which the most famous is "War is the continuation of politics by other means."[3]