Entropy: Origin of the Second Law of Thermodynamics

How did Clausius create entropy and why? I read his original papers to follow how possibly the most confusing concept in Classical Physics was created. My Patreon Page (thanks!): The music is from the awesome Kim Nalley of course Some references: “to cast the theory of Carnot overboard…” Clausius, R “First Memoir” (1850) The Mechanical Theory of Heat (1867) p. 17 In August, 1850 Rankine wrote to William Thomson thanking him for “calling my attention to the paper by Clausius … I approve of your suggestion to send a copy of my paper either to Clausius or Poggendorff” Found in Smith, Crosbie Energy and Empire: A Biographical Study of Lord Kelvin (1989) p. 320 “There is no doubt that Clausius…” Truesdell, C The Tragicomical History of Thermodynamics (2013) p. 204 “…[Clausius’s] hypothesis is so mixed…” Found in Smith, Crosbie Energy and Empire: A Biographical Study of Lord Kelvin (1989) p. 343 “rare modes