Formerly, in practically all parts of the world, there were monarchies, but gradually as monarchy declined from the ideal life of religion to the godless life of sense gratification, monarchies all over the world were abolished. However, simply abolishing monarchy and replacing it with democracy is not sufficient unless the government men are religious and follow in the footsteps of great religious personalities.
Srila Prabhupada, SB 4.14.16, Purport