Probably already a topic on this idea, so let’s make it a feature.
If an alliance Leader has been inactive for a set period of time, remove all members and clear the alliance name so someone else can use it.
You could set it at 365 days. That should allow existing members, that for whatever reason ar hanging around, to find a new home in an active alliance. Though, ideally, it would be less time than a full year.
There are too many inactive alliances clogging up the airways. Otherwise we just have alliances like “Monsters” taking up space because someone started Monsters 906 days ago and walked away.
By decluttering the alliance, it will keep a more active game base.