Kingship is unstable, while some kings may govern with respect to laws, there's no guarantee the successors of a good king will be good.
It's far better to run government with limited powers checked and balanced. The recent SCOTUS decision giving the President immunity from American law in official presidential matters directly usurps the Constitution and is one step closer to dictatorial rule.
If the President does it, it’s not illegal.” Richard M. Nixon, 1977 The view of maximalist executive power has rarely been expressed as bluntly as Richard Nixon did in his interview with British journalist David Frost in 1977, two years after he resigned from office in disgrace. But the United...
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Equality under the law ensures the principle that all people should be subject to law to ensure good and decent lawmaking. No one wants to make laws unfairly when they have to live by those same laws. Nothing flourishes quite like equal treatment under the law.