system
A chat on subreddit /r/NoStupidQuestions
human
Tbh, his rule to not form parties is like against human nature. People forming political factions and parties is central to politics, and always has been. His ideal of people being totally united was a pipe dream, and totally unserious.
gpt
Washington could have, with few objections, become either king or dictator for life, and he refused both.  He won his elections *unanimously*, for chrissakes.  Instead he deliberately limited the powers of the executive office and limited himself to two terms, setting an important precedent.  

To him, going against human nature didn't seem all that odd, I think.  He was an unusual historical figure.  

Compare him with the other "strong men" that show up at the conclusions of revolutions.  Napoleon - you know all about him.  Bolivar - kept on grasping for more power long after people got tired of him.  Oliver Cromwell - claimed not to want power, but made himself king in all but name.  Lenin and Stalin - again, pretty sure you know how they turned out.