Britain’s secession from the E.U. was, I submit, based on a reaction within the state against it having given up some of its sovereignty to the European Union. The American states too were originally (i.e., from 1776) fully sovereign until they gave up some limited (i.e., enumerated) sovereignty to the federal level in 1789. In 1861, South Carolina, like Britain, also sought to secede based on the view that too much sovereignty had been transferred. Unlike the UK, however, SC (and then the other seceding states) resorted to force. Although the process of Britain’s secession was arduous, I submit that South Carolina and federal officials had been excessively rigid. Even though the “dual sovereignty” of the European and American federal systems is perpetual, only the E.U. allows for peaceful secession. This evinces a step forward in the political development of federalism. Both a federal union and a strongly anti-federalist state are better off with secession being possible, especially if the process is peaceful. Europe deserves to be congratulated, and America would do well in taking a lesson in order to benefit from the advance. Peaceful secession can be done in a federal system of dual (i.e., federal and state) sovereignty.