Well, maybe not a total abdication, but Jimbo has relinquished a substantial portions of his powers. See his announcement and the context.
In an upcoming academic article I discuss why calling Wikipedia a monarchy/dictatorship, while not too off the mark in its very early stages, is no longer true. It's nice not to be contradicted by the current events :)
Engaging women to narrow the gender gap: Andrea Kleiman - Since 2011, Kleiman has contributed tens of thousands of edits and arranged workshops for women in Argentina and Uruguay.
1 day ago