Summary by @tldr:

After a series of Riots and Protests against poor living conditions and low wages the civilian population of those off-world colonies will revolt and start a galactic war that will result in countless new weapons being developed and deployed.
By the time the war ends and civilians overthrow and dismantle Earth's governments and businesses over 1 trillion sentient beings are destroyed, mostly non-humans.
Consequences for failure to head those demands: * In 48 hours any governments who have not begun disarming and dismantling all Military weapons systems will find themselves forcibly removed from power and transported to a Penal Colony on Proxima Centauri C (as you humans will eventually name it).
* Once we are satisfied Earth is ready to join our Universal Alliance of Sentient Beings we will remove the vast majority of our forces returning to around 10,000 like what are present now, except we will no longer hide among you.
If anyone, any government or any business attempts to stop us in the next 48 hours we can and will wipe out all electronic devices on Earth and send you humans back into the Dark Ages.