Napoleon's coup was not necessarily conducted to rid the world of absolute monarchy, although it certainly seemed like he was opposed to it. Napoleon was a nationalist leader and a populist, and it got to the point when the French people were fine with a "monarchy" of sorts, as long as it was headed by someone who seemed to be a trustworthy leader, and I would argue that he was. Napoleon's government was much different (structurally and behaviorally) than what you would call an absolute monarchy.