It's truly ironic (and unfortunate) that the UK's tribulations to leave the EU have such close parallels to its difficulties joining its predecessor. In many ways, it demonstrates the weakness (both now and then) of the British economy and (peaceful) political force projection when pit against a united continental core -- led then by France and Germany, nowadays by Germany and France.<p>The UK has much more military leverage than economic leverage. The question of the common market is an economic matter, but the free movement of peoples can go either way. There are factions in all states that would rather treat the latter issue as a matter of civil defence, but that would require the UK engaging in force projection so close to home, which it has for almost half a century closely avoided.