A European trade bloc can succeed without a political union  The European area only consists of liberal democracies, which consistently honour their agreements. While historically a political union might have been necessary to further strengthen the Coal and Steel Treaty (the EU as it originated) between recently belligerent states, these countries can now obtain the benefit of the trade union through multilateral agreements. They simply have to regulate protectionism and tariffs so countries can remain competitive and barriers to trade remain low. In the event that a country does not comply, the external pressure from the other countries, together with soft sanctions, is more than enough to keep the trade bloc functional.