Stability? Peace? Balance? Can i get some sources on that? Whats the longest running democracy? And now does it matchup against the longest dynasty? People al

Stability? Peace? Balance? Can i get some sources on that? Whats the longest running democracy? And now does it matchup against the longest dynasty? People always make these claims but the data just doesn't back it up. How many republic is france on right? 5? How many years did they last on average?