<i>In the US context it led to slavery and ultimately to a massive armed conflict.</i><p>Secession and federalism lead to neither.  Slavery was a pre-existing institution.  War is politics by other means and pre-existed both.  It being associated with secessionism in one case is no more an argument against secessionism than war being associated with democratic revolutions is an argument against democracy.<p>Naive: showing a lack of experience, wisdom, or judgment.<p>Heal thyself.