I would change all of our hearts by removing greed, arrogance and selfishness from our heart and mind.
I may be wrong here but I think the only magic Clara had in mind is that you become king of the USA and you have the power of a dictator. Basically, you can make laws and those laws will be strictly enforced but I don't think she meant you have magical powers of the kind that can change human nature or human physiology.
As I read Clara's question the king could declare that everybody have Sunday off for instance but I don't see the king having the ability to magically grow wings on people so they could fly around like butterflies.
If we're talking pure magic I guess I would just make the world perfect but if we have to deal with reality you certainly can't just order people to feel differently and change their core beliefs. Humans don't operate like that.
You're basically right, Ted, but this was an open-ended question. Kentay's response is the basis of that old saw about how more peaceful this world would be if women, not men, ruled the world. It would necessarily mean different laws than we have now. Ya, I would have preferred specifics on policy, lawmaking, election method after the week was up kinda thing.