How do you solve a problem like Syria?

[BaconBacon96]

Entice the former rebels to enter into a power sharing government. Give them key positions and ensure there is an even divide of the government posts between Shias, Sunnis, Kurds etc.

Combine the remaining armed groups to form a new army. Ask for foreign assistance, to combat and defeat the remaining ISIS threat in cooperation with the Iraqi government.

Negotiate with the international community programs pertaining to securing aid and assisting the many millions of refugees return, if they choose to do so.

Begin a massive reconstruction effort for the country, with the help of international experts to oversee the rebuilding of the national infrastructure. Establish wide reaching programs to re establish social services, including schools and hospitals.