Dear 100 Hour Board,
How different would things be if EVERYONE in the premortal life refused God's plan, and sided with the Devil, leaving no one to be born on Earth?
Conversely, how different would things be if EVERYONE sided with God, even Lucifer, and all got to be born on Earth?
P.S. Will Board Question #91798 be answered soon? It's been quite a while...
So, this is all just speculation and theories from an anonymous internet stranger that as far as you know may or or not be real. This is not the official doctrines or teachings of the Church of Jesus Christ of Latter Day Saints.
So, I think that if everyone in the premortal life refused God's plan and we decided to leave God's presence, then God could have had more spirit children and they could've come to Earth. Obviously all of us rejecting God's plan would be sad for us and for God, but he could just have more kids. Furthermore, in the Church of Jesus Christ of Latter Day Saints we believed that we lived with God for a long time before coming to Earth and were taught by Him (see D&C 138:56). I think that if God could see that none of us were ready to accept His plan then he would've continued to teach us and nurture us until we were ready to accept it.
If everyone sided with God and we all got to be born on Earth I feel like the Plan of Salvation could continue as normal. The very act of us being mortal gives us plenty of challenges and temptations. So even if we didn't have anyone to tempt us I think that we would still have temptation. God would definitely find a way to make things work.
Anyways, that's just my two cents. As an engineering student, we always plan to make sure that things will work in the worst scenario possible. I think that an omnipotent God that loves us has a perfect plan including back up plans for when things don't work out the way intended.