what is a reason the missouri compromise did not have lasting effects

3 answers

A major reason the Missouri Compromise did not have lasting effects is because it was eventually overturned by the Supreme Court in the Dred Scott decision of 1857. This decision declared that the Missouri Compromise was unconstitutional, and it opened the door for the spread of slavery into the northern territories. This ultimately led to the Civil War.
It only applied to the lands of louisiana purchase.
Wilmot proviso