I don't know about you, but I could never get into the ending of Harry Potter. Once Voldemort kicks it, we're whisked ahead 19 years into the future and everyone's married to the first person they dated for more than 10 minutes. We don't see how wizarding society recovers or if Gregory Goyle is tried for war crimes.
Thankfully the folks at Foreign Policy have penned Post-Conflict Potter, a treatise on how to rebuild wizard society after the fall of a certain Parseltongue personality cult:
At such a moment of deliverance, it is natural to feel elation and closure — to allow ourselves the brief comfort of imagining that the drama, so meticulously documented by J.K. Rowling, is over. But if history teaches us anything (consider the bitter legacy still lingering from the 17th-century Goblin Wars or the recent experience of American Muggles in Iraq and Afghanistan), it is that the defeat of Voldemort by Harry Potter may have been the easy part. Indeed, one might even say it was child's play. The hard work of postwar stabilization still lies ahead [...]
Surviving Death Eaters will have to be brought to justice or reintegrated into magical society. Long-standing rifts among magical communities that the war widened must be healed. Most of all, we must ensure that the values that triumphed in the final battle — tolerance, pluralism, and respect for the dignity of all magical and non-magical creatures alike — are reflected in the institutions and arrangements that emerge from the conflict. What ultimately matters is not just whether something evil was defeated, but whether something good is built in its place.
Among their suggestions are to integrate trolls and acromantulas into the reconciliation process. You can read the rest of Post-Conflict Potter here.