Why is the politician's argument not very convincing

What event caused south carolina to secede from union in 1860

Historians are concerned with the accuracy of their writings and readings but are also aware of the inability of authors to know every angle of every story biases, perspectives, beliefs, and a variety of other differences history being told by one person at a time no one being totally accurate, as hard as we try really need on this, and you^^

Which feature of government does montesquieu argue for in his book de l’esprit des lois (spirit of laws)?