An end to all violence. There is enough tragedy and accident in any world you care to name without the resident species (take note humans!) deliberately causing harm to their own. Indeed the Kingdom considers that behaviour a particularly horrible form of madness.
Grand Viziers rounded up and dumped on a remote world where they can do no harm to anyone else. It is beyond the Queen and her Council as to why Grand Viziers are always evil. Her Majesty suspects there is an unknown unwritten rule at work here. Also those with no respect for other peoples’ beliefs to be put somewhere for a brief period where their beliefs are not respected. The Queen anticipates this would lead to a change of heart and greater tolerance fairly quickly too. The Queen appreciates one shouldn't judge a complete group of people by one or two bad examples but genuinely believes Grand Viziers are the exception that prove the rule here.
Dragons learn to get along with other species instead of trying to incinerate them, eat them or otherwise destroy. Those dragons wondering why they’re an endangered species should bear in mind it is because they endanger others and people get sick of it. If dragons wish to put the likes of St. George out of a job, then they’ll need to get along with people.