Freedom of movement predates Schengen.
Magna Carta:
It shall be lawful to any person, for the future, to go out of our kingdom, and to return, safely and securely, by land or by water, saving his allegiance to us, unless it be in time of war, for some short space, for the common good of the kingdom: excepting prisoners and outlaws, according to the laws of the land, and of the people of the nation at war against us, and Merchants who shall be treated as it is said above.
Gain:
Dawud:And how is this different from requiring a visa?
You need a bunch of crap to apply for a visa. With this you only have to go online and fill out a form.
It’s a meta-visa.