There was a book before the game and both are before the movie being made atm. Actually it's the...
Seriously Don't Look. Really.
infamous hacker who started this all in an alliance with Ryder the military colonel.
The people can always be brought to the bidding of the leaders.That is easy.All you have to do is tell them they are being attacked and denounce the pacifists for lack of patriotism and exposing the country to danger.It works the same way in any country.