In my view, those countries with a nuclear deterrent are putting themselves more at risk from today's threats. We're not spending our money wisely. We're taking the heat off those countries without nukes. They're letting us spend the cash on Trident while they focus on what matters: tackling terrorism and stopping the growth of terrorist groups.
National security is deeply linked to the trajectories of nuclear proliferation, arms races and the success of diplomatic efforts to stem the tide. Future British governments would do well to maximise their efforts to develop a globally cooperative approach that undercuts the drivers of proliferation and reduces the salience nuclear weapons have to all states, and maximises the tendency in them all to act in a social responsible manner, with or without nuclear weapons. How they can do this effectively in the coming years must be at the top of their foreign policy agenda.
As the new British government in particular approaches the post election consideration of Trident renewal we must avoid the lazy temptation to think this is someone else's problem, or that answers lie in multilateral nuclear disarmament - because that is simply an excuse for no change, business as usual... until disaster strikes.
The efforts to question Ed Miliband's commitment to maintain a credible independent nuclear deterrent have failed to land with the electorate. But it would be a serious error to think that is down to the repeated assurances that a Labour government will follow through with full renewal of the system...
A recent argument made by nuclear weapons supporters has been that the increase of terrorism means we need nuclear weapons. Personally I believe the opposite is true - an increase in acts of terrorism is precisely why nuclear weapons are adding to insecurity: you cannot use a 'deterrent' against an ideology that does not care who it destroys - including its own followers.
Moving forward, we need to recognise the important role our nuclear deterrent plays internationally. Despite the global security environment having changed markedly since 1940, to abandon our deterrent now would only serve to undermine our own security, the security of our allies and that of liberal democracy globally.
Why not attend? The government explanation for non-attendance - once you get beyond complaints that the conference goals are 'unclear' - is that the conference may talk about the possibility of a negotiated global ban on nuclear weapons. Our government doesn't believe that such a ban is negotiable. So herein lies the contradiction.