The Ghorman Massacre was indeed an inciting incident.
I'd give this to Mon Mothma or Bail Organa. Mothma is referred to as the Mother of the Rebellion, isn't she?
http://starwars.wikia.com/wiki/Alliance_to_Restore_the_Republic
it was Padme, Bail and Mon Mothman, plus some others, who formed the Treaty/Petition of Two Hundred (or was it thousand) senators. this was to present to the senate and called for Palpatine to step down. technically, this was the seed of the rebellion.
the true rebellion began with the Corellian Treaty, and included Bail Organa, Mon Mothma and Garm Bel Iblis. They were the three major players...
but there were others, such as Bria Tharen (a lover of Han Solo)
Originally posted by .😖pace Opera:.
just read the books. practically a a thousand people started the Rebellion.
Two thousand, actually. It was the members of the Petition of Two Thousand, which is basically saying to the Chancellor, "We demand that you return your emergency powers back to the Senate."
Anyway, Mon Mothma wanted to keep on fighting even after Bail Organa thought it was useless.