Didn’t the outcome of the “Civil War” prove that secession is not an option for any State?
No. It only proved that, when allowed to act outside his lawfully limited authority, a U.S. president is capable of unleashing horrendous violence against the lives, liberty, and property of those whom he pretends to serve. The Confederate States (including Texas) withdrew from the Union lawfully, civilly, and peacefully, after enduring several decades of excessive and inequitable federal tariffs (taxes) heavily prejudiced against Southern commerce.[4] Refusing to recognize the Confederate secession, Lincoln called it a “rebellion” and a “threat” to “the government” (without ever explaining exactly how “the government” was “threatened” by a lawful, civil, and peaceful secession) and acted outside the lawfully defined scope of either the office of president or the U.S. government in general, to coerce the South back into subjugation to Northern control.[5] The South’s rejoining the Union at the point of a bayonet in the late 1860s didn’t prove secession is “not an option” or unlawful.