States can be deterred by the fear of retaliation; non-state organisations cannot by deterred at all.
The EU and the U.S. often work together to develop international standards. This is the case in fighting terrorism and transnational crime, advancing trade liberalization, and combating piracy and intellectual property violations.
The E.U. is more than just a trade organization or a common market; it is a guarantee of democracy, freedom, justice, and human rights. Nations cannot stay in the E.U. if they do not respect these guarantees.
Financial service providers act as the lubricating oil in the economy. They link consumers who want to invest their savings for a good return with companies who want to borrow on best terms for expansion.
Non-proliferation will only work if all states are willing to cooperate, and that will only happen if all feel they are being treated fairly.
Since creation of the E.U. a half century ago, Europe has enjoyed the longest period of peace in its history.