Sci-Fi: The Sector Earth Authority

I was fooling around and came up with a Sector Earth Authority inspirational poster.  In the novels, the genuine article is often seen hanging from the side of old Threshold-era skyscrapers in Old Earth's more crowded cities.

...what, you didn't think Earth would be a nice place to live in my sci-fi, did you?  In truth, it's not bad in the Alliance territories, but they only hold 8% of the planet's surface.  The rest is under these guys.

Backstory:
In the year 450 ADH, the Authority is Old Earth's supreme government.  The Era of the Great Marches is long vanished, and the vast majority of Old Earth's mostly genetic-baseliner population is content with their lot - a diet of Terran exceptionalism, the Diaspora Irredenta, the Divinity of Humanity and news of a Diaspora which surely marvels at the splendour of the Homeworld, under a government which most of the Diaspora would happily see fall - if it wasn't the main bulwark preventing the attempted co-option of the entire United Earth Alliance into the populace's agenda.

The Diaspora Humanarum would not exist without Old Earth.  The Homeworld is the point of origin of Humanity itself, and, it is estimated of over 90% of the living things within the Inner Diaspora.  Four hundred and fifty years after the dawn of the era of the DH, Old Earth is no longer alone: the Inner Diaspora contains a two thousand stars and a hundred worlds where humans can walk unaided under the open sky.  Many of these hundred worlds are beacons of human civilisation, optimistically striving towards the future even if they might disagree on the path.  Old Earth is not one of those worlds...

...And, one day, that will be a very big problem.  For now, the rest of the Alliance Grand Council members are able to keep the Earth Authority's worst excesses in check, although there is precious little they can do for the billions of Terrans who live outside the scattered Allied Administrative Territories of Geneva, Jerusalem, East Africa, Singapore, Sumatra and Greater Kourou.  The demilitarisation of the Solar System is an added wrinkle - while it has prevented coups and successfully impressed the sanctity of the Home System on the Diaspora's governments and population, it has left the largest organised force in the system as the Earth Authority Gendarmerie.

None of this is admitted in public, not even on the most liberal Allied worlds such as Aion, Lu'an or Atlantaea.  Only outside the Alliance's borders is the rot at its heart truly visible.  And, as the Alliance accounts for fully half the human race on its own, that rot will be a very big problem.

One day.