Answer:
I think the answer is:
2.If slavery was not allowed the South would not help to fight the war
They believed in a system that rewarded hard work with wealth.
The motto of United States is that it is a country of opportunities where everyone can prosper if they work hard and if they are smart enough, not that it is a country where you have no progress and you stagnate. This was deeply embedded in the mindset of the Americans who firmly believed that with hard work you can progress and get promotions, and run your own business, and get wealthy because they have deserved it, so Marxism came as a very repulsive ideology that was rejected immediately.
HOPE IT HELPED! :)
My belief may be different from yours...
I am a Christian, for me, when I pass if I really truly believe that Jesus died for me on the cross I will go to heaven. I believe in God the Father, Jesus the sun, and the holy spirit. This might not be your perception of God or heaven, but it is to me.