Why did the system of government in the soviet union to create conflict with the united states after world war ii?

There are several immediate consequences of the Civil War.

1) The Union was preserved even though the Southern States had to re-apply to enter back into it.

2) Slavery was abolished.

3) Generation gap caused by the death of so many men throughout the war.

4) The South was left reeling from the damage to its agricultural lands which would take years to recover.

Also the South was held back in regards of standards of industry and education compared to the North.

5) not all slaves were free.