Secession is a concept as old as the American Revolution itself, as the early colonists seceded from Britain with the Declaration of Independence. Armies and guns soon invaded, as also occurred in the South seceding in 1861 prompting the War Between the States.
Today, we’ve come a long way from armies suppressing dissent: now we vote on it. This is a more peaceful means of potentially establishing new countries and social systems, but only if the government “representing them” allows it.