Alexander the Great - very good.
(The following is apocryphal history and I hope someone who actually knows what he or she is talking about will be along shortly.)
When Big Alex conquered an area he told the regional governors they could stay, and keep a higher proportion of the taxes they collected for the king (now that it’s Alex). He also lowered the tax rates. The populace paid less in taxes, and the governors kept more money - a windfall for both, and he bought the loyalty of both instantly. If his enemies re-conquered any territory they would have had a heck of a time putting things back on the old path.
My favorite AtG story is, if true, the Best Policy Decision of All History[sup]TM[/sup].
When Al conquered an area, he did not insist they get rid of their local and traditional gods, but rather they add a bust of him along side all the local gods. Co-opt the local religion, don’t destroy it and bring up resentments.
But then Alexander conquered the land of the Jews. Jews had this unusual no-graven-idols thing going on. Had Alexander insisted on having a statue of himself in the Jewish temples, he would have started a revolt.
Supposedly someone who understood the situation got to AtG and explained it to him. Then offered him an alternative - a certain percentage of the boys born to the Jewish priest class would be named for Alexander. Since Jews traditionally name children after their ancestors[sup]1[/sup], the name of Alexander would continue for generations - a greater tribute than a mere statue.
AtG agreed to this, and to the present day, Alexander is a very common name for Jewish boys.
Alexander the Great decided to adapt an existing policy to changed circumstances. That policy has continued to serve its purpose, without any changes or further adaptations, for 2,300 years.
Two thousand three hundred years!!
Most policies don’t last 2,300 hours, but this one has outlasted several empires. It is the Best Policiy Decision in History.
Now that’s adapting to change!
[sup]1[/sup] Among modern Jews who name their kids after relatives, European Jews tend to name their children only after deceased relatives, but Asian and African Jews tend to name their children only after living relatives. Each group traditionally considered the other policy “bad luck”. People are silly sometimes.