Article 23 of the "Universal Declaration of Human Rights" says:
Quote:
Everyone has the right to work, to free choice of employment, to just and favourable conditions of work and to protection against unemployment.
This is, how in we Europe understand "right to work laws".
(Starting in 1946 in Switzerland, nearly in every European country there have been attempts to constitute these rights as 'basic laws' or similar - all failed until now.*)
(*"Work constitutes a right and shall enjoy the protection of the State, which shall seek to create conditions of employment for all citizens and shall pursue the moral and material advancement of the rural and urban working population." This is from the Greek constitution. Similar is to found in others as well, but I've never heard of that you could sue this right.
Human rights are, btw, part of the German Basic law as well.)